RESEARCH ARTICLE
Hospital Mortality and Functional Outcomes in
Pediatric Neurocritical Care
Cydni N. Williams, MD,a,b Carl O. Eriksson, MD, MPH,b Aileen Kirby, MD,b Juan A. Piantino, MD,a,c Trevor A. Hall, PsyD,a,d Madison Luther, BS,b
Cindy T. McEvoy, MD, MCRe
METHODS: We conducted a 2-year observational study of children aged 0 to 18 years admitted to the ICU
with a primary neurologic diagnosis (N 5 325). Primary outcomes were death and change in FSS from
preadmission baseline to discharge. New disability was defined as an FSS change of $1 from baseline,
and severe disability was defined as an FSS change of $3. Categorical results are reported as relative risk
(RR) with 95% confidence interval (CI).
RESULTS: Thirty (9%) patients died. New disability (n 5 103; 35%) and severe disability (n 5 37; 13%)
were common in PNCC survivors. New disability (range 14%–54%) and severe disability (range 3%–33%)
outcomes varied significantly among primary diagnoses (lowest in status epilepticus; highest in infectious
and/or inflammatory and stroke cohorts). Disability occurred in all FSS domains: mental status (15%),
sensory (52%), communication (38%), motor (48%), feeding (40%), and respiratory (12%). Most (64%)
patients with severe disability had changes in $3 domains. Requiring critical care interventions (RR 2.1;
95% CI 1.5–3.1) and having seizures (RR 1.5; 95% CI 1.1–2.0) during hospitalization were associated with
new disability.
CONCLUSIONS: PNCC patients have high rates of death and new disability at discharge, varying
significantly between PNCC diagnoses. Multiple domains of disability are affected, underscoring the
ongoing multidisciplinary health care needs of survivors. Our study quantified hospital outcomes of
PNCC patients that can be used to advance future research in this vulnerable population.
www.hospitalpediatrics.org
DOI:https://doi.org/10.1542/hpeds.2019-0173
Copyright © 2019 by the American Academy of Pediatrics
Address correspondence to Cydni N. Williams, MD, Department of Pediatrics, Oregon Health and Science University, 707 SW Gaines St,
CDRC-P, Portland, OR 97239. E-mail: willicyd@ohsu.edu
HOSPITAL PEDIATRICS (ISSN Numbers: Print, 2154-1663; Online, 2154-1671).
FINANCIAL DISCLOSURE: The authors have indicated they have no financial relationships relevant to this article to disclose.
FUNDING: Dr Williams is supported by the Agency for Healthcare Research and Quality (grant K12HS022981). The content is solely the
responsibility of the authors and does not necessarily represent the official views of the Agency for Healthcare Research and Quality.
Dr Piantino is supported by the National Heart, Lung, and Blood Institute (grant K12HL133115). Dr McEvoy is supported by the
National Heart, Lung, and Blood Institute (R01 HL105447) with cofunding from the Office of Dietary Supplements (R01H L129060
and UH3OD023288). Funded by the National Institutes of Health (NIH).
POTENTIAL CONFLICT OF INTEREST: The authors have indicated they have no potential conflicts of interest to disclose.
Dr Williams conceptualized and designed the study, collected data, performed analyses, and drafted the manuscript; Drs Piantino, Hall, and
Kirby and Ms Luther participated in data collection and reviewed and revised the manuscript; Dr Eriksson participated in data collection
and data analysis and reviewed and revised the manuscript; Dr McEvoy participated in the conceptualization of the study and reviewed and
revised the manuscript; and all authors satisfy requirements for authorship and approved the final manuscript as submitted.
958
a
Pediatric Critical Care
and Neurotrauma
Recovery Program and
b
Divisions of Pediatric
Critical Care, cPediatric
Neurology, dPediatric
Psychology, and
e
Neonatology,
Department of Pediatrics,
Oregon Health and
Science University,
Portland, Oregon
WILLIAMS et al
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ABSTRACT
OBJECTIVES: Pediatric neurocritical care (PNCC) outcomes research is scarce. We aimed to expand
knowledge about outcomes in PNCC by evaluating death and changes in Functional Status Scale (FSS)
from baseline among PNCC diagnoses.
Previous research has focused on death and
gross outcomes, such as the Pediatric
Overall Performance Category or Glasgow
Outcome Scale-Extended.5–10 Although easy
to administer, these scales do not provide
detail about the type or domain of the
disability found and therefore may lack the
sensitivity needed for intervention research.
The Functional Status Scale (FSS) is a
recently validated measure specifically
developed to overcome these challenges in
pediatric critical care outcomes research by
measuring 6 domains of function: mental
status, sensory, communication, motor,
feeding, and respiratory.11 Previous work
using the FSS shows that 7% of pediatric
critical care survivors with a neurologic
diagnosis and 11% of patients with
traumatic injuries have a change in FSS
from baseline of $3.12,13 Another study
focused on children with TBI requiring
critical care intervention showed that 37%
had a change in FSS of $3. This suggests
variability in outcomes between neurologic
diagnoses,14 but previous studies have not
evaluated FSS among many PNCC diagnoses.
Additionally, changes of $3 in FSS
represent substantial impairments in
function and a cutoff correlating with
moderate or severe impairments in
adaptive function11,15 and underestimate the
overall burden of new functional deficits
that require ongoing care.
We evaluated hospital outcomes among
PNCC admissions by quantifying death and
changes in FSS from preadmission baseline
both overall and among different PNCC
diagnoses. We quantified changes by
domain of FSS to provide greater detail on
outcomes and explored risk factors for
worse outcomes. We hypothesized that rates
of disability measured by changes in FSS
would vary significantly by primary
diagnosis.
METHODS
Study Design and Setting
We conducted an observational study of
consecutive children ages 0 to 18 years
admitted with a primary neurologic
diagnosis to the ICU at an academic tertiary
children’s hospital and accredited level
1 pediatric trauma center from August
2016 to August 2018. This study was
approved by the institutional review board
with a waiver of informed consent.
Deidentified data will be made available on
request.
Participants and Data Collection
The primary exposure was admission
diagnosis: TBI, status epilepticus,
neuroinfectious and inflammatory diseases
(meningitis, encephalitis, abscess or
empyema, or demyelinating), stroke
(hemorrhagic, ischemic, or cerebral sinus
venous thrombosis [CSVT]), and hypoxicischemic encephalopathy (HIE) due to out-ofhospital cardiac arrest requiring chest
compressions for .2 minutes. In patients
with multiple diagnoses, the primary
diagnosis was used (eg, patients with
seizures due to meningitis were classified
as infectious). All patients meeting inclusion
criteria during daily census review were
included in the study. Only characteristics of
the first PNCC admission during the study
period for a particular patient were
included in the analysis.
Demographic and clinical characteristics
were collected from electronic medical
records and entered into Research
Electronic Data Capture prospectively
during admission.16 Preadmission chronic
conditions were grouped into system
categories (Supplemental Table 4). Pediatric
Index of Mortality 2 scores and critical care
interventions evaluated illness severity.
Interventions included intubation,
noninvasive ventilation, central venous
catheterization, arterial catheterization,
HOSPITAL PEDIATRICS Volume 9, Issue 12, December 2019
intracranial pressure monitoring,
continuous antiepileptic infusion,
neurosurgical intervention (eg,
decompressive craniectomy and hematoma
evacuation), hemodynamic resuscitation or
vasopressor use, and in-hospital
cardiopulmonary resuscitation (CPR).
Interventions were not included if they
were used during operative management
only (eg, intubation for operation). Seizures
were diagnosed clinically and on EEG
monitoring. TBI severity was measured by
the initial Glasgow Coma Scale (mild
complicated 13–15, moderate 9–12, and
severe 3–8) recorded in the emergency
department. Location and type of TBI were
identified from radiology reports, and
concurrent nonbrain traumatic injuries
were identified from radiology and clinical
reports.
Outcomes
The primary outcomes were in-hospital
death and change in FSS from baseline.
Manner of death was recorded from
provider notes. The change from baseline
FSS at hospital discharge was used to
define disability outcomes and collected for
all eligible patients. The FSS is validated for
use in pediatric critical care outcomes in
children of all ages, has excellent interrater
reliability (intraclass correlation coefficient
5 0.95),11 and correlates with the Adaptive
Behavior Assessment System–Second
Edition.11 Baseline FSS scores, reflecting
patients’ preillness function, were
documented in the medical record by the
treating attending PICU physician within
24 hours of admission per our institution’s
standard. Discharge FSS scores were
inputted into the medical record by a
treating attending PICU or neurology
physician as part of the PNCC program.17
Discharge FSS scores reflected the patient’s
status on the day of discharge. Physicians
prospectively inputted FSS on the basis of
the 5-category rubric designed by Pollack
et al12 in a tool embedded in the electronic
medical record. For this study, we defined
new disability as an increase from baseline
to discharge FSS total score of $1 point
and new severe disability as an increase of
$3. No patients had improvement from
baseline FSS.
959
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Patients with pediatric neurocritical care
(PNCC) conditions account for 20% of all
pediatric critical care admissions in the
United States.1–3 PNCC conditions include
traumatic brain injury (TBI), status
epilepticus, neuroinfectious and
inflammatory conditions, stroke, and
cardiac arrest. These patients frequently
require critical care interventions, account
for billions of dollars in annual hospital
costs, and suffer high rates of mortality and
morbidity.4 However, quantification of
detailed outcomes among many PNCC
diagnoses is scarce and limits intervention
research to improve outcomes for these
vulnerable children.
TABLE 1 Characteristics and Outcomes of the PNCC Cohort Overall and by Primary Diagnosis
Characteristic or Outcome
All PNCC
TBI
Status
Epilepticus
Infectious and/or
Inflammatory
Cardiac
Arrest
Stroke
N 5 325
n 5 154
n 5 71
n 5 40
n 5 37
n 5 23
Age, y, median (IQR)
5.0 (1.3–11.6)
5.5 (1.3–11.7)
3.9 (1.7–8.9)
6.2 (1.8–12.6)
1.2 (0.3–12.6)
9.5 (1.2–15.5)
White race, n (%)
253 (78)
130 (84)
53 (75)
27 (68)
24 (65)
19 (83)
49 (15)
19 (12)
15 (21)
6 (15)
3 (8)
6 (26)
Male sex, n (%)
198 (61)
101 (66)
40 (56)
23 (58)
22 (60)
12 (52)
Medicaid insurance, n (%)
165 (51)
66 (43)
41 (58)
26 (65)
22 (60)
10 (44)
Hispanic ethnicity, n (%)
24.1 (24.2 to 23.2) 24.2 (24.2 to 23.8) 24.0 (24.2 to 23.2) 24.2 (24.3 to 23.3)
Previous critical care
admission, n (%)
21 (7)
1 (1)
15 (21)
Preadmission chronic
condition, n (%)
96 (30)
16 (10)
51 (72)
184 (56)
68 (44)
Critical care intervention,a
n (%)
Intubation
0
0.5 (22.8 to 1.9) 24.3 (24.7 to 23.2)
4 (11)
1 (4)
5 (13)
13 (35)
11 (48)
34 (48)
28 (70)
36 (97)
13 (57)
9 (39)
138 (42)
45 (29)
34 (48)
14 (35)
36 (97)
Central venous line
82 (25)
20 (13)
3 (4)
20 (50)
31 (84)
8 (35)
Arterial line
78 (24)
27 (18)
2 (3)
6 (15)
33 (89)
10 (44)
Neurosurgical intervention
66 (20)
29 (25)
17 (43)
0
10 (44)
Hemodynamic intervention
56 (17)
11 (7)
8 (20)
31 (84)
5 (22)
Intracranial pressure
monitor
21 (6)
12 (8)
0
4 (10)
0
5 (22)
CPR in hospital
12 (4)
1 (1)
0
8 (22)
3 (13)
Infusion of seizure
medication
25 (8)
2 (1)
15 (21)
4 (10)
3(8)
1 (4)
68 (21)
10 (7)
31 (44)
14 (35%)
8 (22)
5 (22)
Seizure during hospitalization,
n (%)
0
1 (1)
0
Inpatient nutrition, n (%)
Any parenteral
15 (5)
5 (3)
1 (1)
3 (8)
4 (11)
2 (9)
Any nasogastric or
postpyloric feeds
44 (14)
12 (8)
8 (11)
12 (30)
6 (16)
6 (26)
Inpatient consults, n (%)
Physical therapy
141 (43)
68 (44)
18 (25)
28 (70)
11 (30)
16 (70)
Occupational therapy
110 (34)
49 (32)
14 (20)
23 (58)
9 (24)
15 (65)
Speech therapy
54 (17)
17 (11)
6 (9)
15 (38)
5 (14)
11 (48)
Psychology
36 (11)
19 (12)
2 (3)
9 (23)
4 (11)
Hospital days, median (IQR)
3.3 (1.6–8)
2.4 (1.5–5.2)
2.0 (1.3–5.4)
8.1 (6.0–16.4)
2.7 (1.5–7.8)
9.4 (4.4–13.6)
Critical care days, median
(IQR)
1.4 (0.8–3.0)
1.0 (0.7–1.9)
1.0 (0.7–2.5)
2.8 (1.5–4.7)
2.7 (1.5–4.4)
3.0 (1.5–6.4)
Mechanical ventilation hours,b
median (IQR)
37 (5.5–102.8)
11 (108.4–11.2)
10.7 (2.1–57.2)
63.3 (24.9–104)
70.4 (48.5–108)
Hospital mortality, n (%)
30 (9)
3 (2)
Discharge to inpatient
rehabilitation, n (%)
29 (9)
11 (7)
0
1 (3)
4 (6)
8 (20)
Baseline FSS, median (IQR);
maximum value
6 (6–6); 18
6 (6–6); 14
6 (6–11); 18
6 (6–6); 8
Discharge FSS,c median (IQR);
maximum value
6 (6–8); 27
6 (6–7); 22
7 (6–11); 21
7 (6–8); 15
960
25 (68)
0
6 (6–6); 15
6.5 (6–8); 26
2 (9)
80 (29.8–136.4)
1 (4)
6 (26)
6 (6–6); 9
7.5 (6–9); 27
WILLIAMS et al
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Pediatric Index of Mortality
2 score, median (IQR)
TABLE 1 Continued
Characteristic or Outcome
FSS change,c median (IQR);
maximum value
New disability,c FSS change, n
(%)
a
c
TBI
Status
Epilepticus
Infectious and/or
Inflammatory
Cardiac
Arrest
Stroke
N 5 325
n 5 154
n 5 71
n 5 40
n 5 37
n 5 23
0 (0–1); 21
0 (0–1); 16
0 (0–0); 15
1 (0–2); 9
0 (0–1); 20
0.5 (0–3); 21
103 (35)
56 (37)
10 (14)
21 (54)
5 (42)
11 (50)
1 or 2c
66 (22)
39 (26)
8 (11)
12 (31)
3 (25)
4 (20)
$3c
37 (13)
17 (11)
2 (3)
9 (23)
2 (17)
7 (30)
Multiple critical care interventions in some patients.
Among patients undergoing mechanical ventilation.
Evaluated among survivors only (n 5 295).
Statistical Analysis
Descriptive statistics were used, including
percentage for categorical variables and
median with interquartile range (IQR) for
continuous variables, because data were
not normally distributed. Demographic and
clinical characteristics were compared
between survival and disability groups. x2
tests for categorical variables (with Fisher’s
exact correction for expected cell counts
,10) and Mann-Whitney U tests for
continuous variables were used. Bivariate
results for categorical variables were
reported as relative risk (RR) with 95%
confidence interval (CI). The primary
analysis compared new disability groups
among the overall PNCC cohort. The
hypothesized variability in new disability
rate by diagnosis was tested by using x2
tests. Secondary analyses were conducted
to compare the overall cohort by new
severe disability and to explore outcomes
among individual diagnoses (Supplemental
Tables 5–9). All tests were 2 tailed, and
significance was defined as P , .05.
Because secondary analyses were
exploratory within limited populations, no
adjustment was made for multiple
comparisons. All analyses were conducted
by using SPSS (version 24.0; IBM SPSS
Statistics, IBM Corporation).
RESULTS
Over 2 years, 325 patients had a primary
PNCC diagnosis, accounting for 16% of all
ICU admissions. Diagnoses included TBI
(n 5 154; 47%), status epilepticus (n 5 71;
22%), infectious or inflammatory disease
(n 5 40; 12%), HIE (n 5 37; 11%), and stroke
(n 5 23; 7%). One-third (n 5 96) had
preadmission chronic conditions, which
varied by primary diagnosis (Supplemental
Table 4). Most (84%) patients had normal
baseline FSS (FSS 5 6). Severity of illness
varied, but 56% received at least 1 critical
care intervention, and 25% received 3 or
more. Table 1 describes the PNCC cohort
and hospital outcomes. Detailed
characteristics among each diagnosis are
reported in Supplemental Tables 5 through 9.
Thirty (9%) PNCC patients died during
hospitalization, most (83%) with HIE.
Fourteen deaths (47%) occurred after
withdrawal of support, 13 (43%) occurred
by neurologic criteria, and 3 (10%) were
due to in-hospital cardiac arrest. Among
PNCC survivors (n 5 295), 103 (35%) had a
new disability defined as an FSS change
from baseline of $1 (Fig 1), which varied
significantly by diagnosis (range 14%–54%;
P , .001). Survivors with status epilepticus
had less disability (RR 0.4; 95% CI 0.2–0.7),
and survivors with infectious and/or
inflammatory conditions (RR 1.6; 95% CI
1.2–2.3) had more disability at discharge
compared with those with other diagnoses.
Thirty-seven (13%) survivors had a new
severe disability (FSS change $3),
particularly among stroke survivors
(RR 2.9; 95% CI 1.4–5.8).
Changes in FSS among patients with a new
disability ranged from 1 to 21 points (Fig 2).
Receiving critical care interventions (RR 2.1;
95% CI 1.5–3.1) and having seizures (RR 1.5;
95% CI 1.1–2.0) during hospitalization were
associated with new disability (Table 2).
PNCC patients surviving with new disability
had significantly longer hospital lengths of
stay compared with all ICU admissions
(median 8.6 vs 3.8 days) and PNCC survivors
without new disability (8.6 vs 2.1 days; both
P , .05). Six (2%) survivors underwent
tracheostomy and gastrostomy placement.
Twenty-nine (9%) patients were discharged
to inpatient rehabilitation, including 17
(59%) with new severe disability and 12
(41%) with FSS changes of 1 or 2.
FIGURE 1 Outcomes of children receiving neurocritical care. The chart shows percentages of
patients within each diagnosis, with the outcomes of death and new disability being
measured by the FSS score change from baseline at hospital discharge.
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b
All PNCC
hypothermic submersion injury18 and 1 with
ventricular tachycardia due to myocarditis.
New disability among survivors was
associated with seizures during admission
(RR 4.5; 95% CI 1.3–15.3), younger age, and
nonarrhythmia causes of arrest (all P , .05;
Supplemental Table 8).
Among patients with new disability, fewer
changes (#15%) were found in mental
status and respiratory domains compared
with sensory (52%), motor (48%), feeding
(40%), and communication (38%). Table 3
shows the prevalence of individual FSS
domain changes, which varied by diagnosis.
Within most FSS domains, changes of
1 were most prevalent Supplemental Fig 3).
However, multiple domains were often
affected (67% of patients with severe
disability had changes in $3 separate
domains).
TBI accounted for 154 admissions (68% mild
complicated, 16% moderate, and 16% severe
TBI). Three (2%) patients died, including
2 with severe TBI with nonreactive pupils at
admission (neurologic criteria) and 1 with
moderate TBI and polytrauma (cardiac
arrest). Fifty-six (37%) survivors had a new
disability, varying significantly with Glasgow
Coma Scale (23% of mild complicated, 58%
of moderate, and 72% of severe; P , .001).
Seventeen (11%) survivors had a new
severe disability (5% mild complicated, 17%
moderate, 35% severe; P , .001). Seizures,
frontal lobe injury, contusions, and diffuse
axonal injury all increased risk for new
disability (all P # .03; Supplemental Table 5).
Other injuries (eg, thoracic, spine, and
extremity) increased the risk of new
disability compared with isolated TBI (RR
5.3; 95% CI 2.8–10). Only 9 (12%) patients
with isolated TBI had new disability.
Patients (n 5 71) with status epilepticus
had better outcomes compared with those
with other diagnoses (Table 2). No patients
died, 10 (14%) had new disability, and 3%
962
had severe disability. Preadmission epilepsy
(54%) and febrile status (23%) were the
most common etiologies. Most patients
(72%) had preadmission chronic conditions,
and 21% had previous ICU admissions.
Seizures continued after admission in 31
(44%) patients. Fifteen (20%) patients had
refractory status epilepticus requiring
infusions of versed or pentobarbital, and
this was associated with new disability (RR
5.6; 95% CI 1.8–17.3; Supplemental Table 6).
Among 40 patients with infectious and
inflammatory disease, 1 patient with
unknown encephalitis died (neurologic
criteria), 21 (53%) survivors had new
disability, and 9 (23%) had severe disability.
Thirty patients had infectious, 7 had
inflammatory, and 3 had indeterminate
diagnoses (all encephalitis of unknown
etiology). Inflammatory and indeterminate
diagnoses were associated with increased
risk of new disability compared with
infectious diagnoses (RR 2.5; 95% CI 1.6–3.9;
Supplemental Table 7).
Among 37 HIE patients, 25 (68%) died during
hospitalization from withdrawal of life
support (48%), neurologic criteria (44%), or
subsequent cardiac arrest (8%). Among
12 survivors, 5 (42%) had new disability. Two
(17%) survivors had new severe disability,
both receiving .30 minutes of CPR and
1 being discharged to hospice. Duration of
preadmission CPR ranged from 3 to
102 minutes. Survivors had lower median
CPR duration (10 vs 40 minutes; P 5 .03),
although 5 survivors received $30 minutes
of CPR. Two survivors without disability
received $30 minutes of CPR, 1 with
DISCUSSION
Most patients (84%) with PNCC diagnoses
have normal FSS at baseline but suffer high
rates of death (9%) and new disability (35%)
at discharge, including 13% with new severe
disability. Outcomes vary significantly with
primary diagnosis. PNCC survivors often
have functional impairments in multiple FSS
domains that require ongoing care after
hospital discharge, furthering the burden of
PNCC diseases. Increased severity of illness
and seizures during admission are
associated with worse outcomes, whereas
other risk factors varied by diagnosis. This
study provides data on new disabilities
among individual PNCC diagnoses using the
FSS that can be used to advance future
research.
We found that nearly 1 in 10 PNCC
admissions result in death, confirming
results from previous administrative data
and point-prevalence studies in PNCC3,4 and
showing that PNCC mortality is substantially
higher than rates for other PICU cohorts.12,19
We also found high rates of morbidity that
were consistent with previous reports.
Pollack et al12 reported that 7% of critical
WILLIAMS et al
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FIGURE 2 FSS change among survivors with new disability. Distribution of FSS total score
change from baseline at hospital discharge among diagnosis categories.
Among 23 patients with stroke, 10 had
hemorrhagic stroke (all arteriovenous
malformations or cavernomas), 9 had
ischemic stroke (1 patient with secondary
hemorrhage), and 4 had CSVT. One patient
with malignant middle cerebral artery
stroke died. Half of stroke survivors had
new disability, and one-third had severe
disability. No CSVT patients had new
disability at discharge, whereas
hemorrhagic and ischemic stroke had a
high prevalence of new disability (55% and
63%, respectively) and new severe disability
(43% and 50%, respectively). Although not
statistically significant, survival with
disability was more common with critical
care interventions (RR 2.2; 95% CI 0.8–6.3)
and seizures (RR 1.6; 95% CI 0.8–3.6;
Supplemental Table 9).
TABLE 2 Characteristics of the PNCC Cohort by Hospital Outcome
Characteristic
Death in Hospital
n 5 192
n 5 103
Age, y, median (IQR)
1.7 (0.5–11.6)
4.5 (1.3–10.6)
6.6 (1.7–12.7)
6.6 (2.0–11.4)
White race, n (%)
18 (60)a
152 (79)
83 (81)
27 (73)
n 5 30
Hispanic ethnicity, n (%)
Male sex, n (%)
Survival With
Baseline
Function
Survival With Any
New
Disability
Survival With Severe
Disability
n 5 37
4 (13)
30 (16)
15 (15)
5 (14)
14 (47)
124 (65)
60 (58)
21 (57)
19 (63)
Pediatric Index of Mortality 2 score, median (IQR)
1.0 (21.9 to 2.1)a
99 (52)
47 (46)
24.1 (24.2 to 23.3)
24.1 (24.3 to 23.1)
17 (46)
23.2 (24.3 to 22.7)
Previous critical care admission, n (%)
2 (7)
15 (8)
4 (4)
1 (3)
Preadmission chronic condition,b n (%)
11 (37)
62 (32)
23 (22)
6 (16)
95 (50)
56 (54)
17 (46)
Admission diagnosis category, n (%)
3 (10)a
TBI
a
Status epilepticus
0
Infectious or inflammatory
61 (32)
1 (3)
Cardiac arrest
Stroke
Critical care intervention,e n (%)
9 (24)c
21 (20)
25 (83)
7 (4)
5 (5)
1 (3)
11 (6)
11 (11)
7 (19)c,d
82 (43)
72 (70)c
29 (78)c,d
51 (27)
c
26 (70)c,d
c
30 (100)a
a
Intubation
2 (5)c,d
c
10 (10)
18 (9)
a
c
30 (100)
2 (5)
57 (55)
Central venous line
a
29 (97)
14 (7)
39 (38)
25 (68)c,d
Arterial line
29 (97)a
12 (6)
37 (36)c
25 (68)c,d
3 (10)
32 (17)
31 (30)c
16 (43)c,d
c
14 (38)c,d
c
14 (14)
9 (24)c,d
3 (3)c
3 (8)c,d
Neurosurgical intervention
a
Hemodynamic intervention
29 (97)
Intracranial pressure monitor
2 (7)
CPR
9 (30)a
Infusion of seizure medication
2 (7)
7 (4)
20 (19)
5 (3)
0
11 (6)
7 (11)
c
5 (14)
8 (27)
32 (17)
28 (27)
9 (24)
Any parenteral
1 (3)
4 (2)
10 (10)c
7 (19)c,d
Any nasogastric or nasojejunal
1 (3)
9 (5)
34 (33)c
22 (60)c,d
66 (34)
72 (70)c
34 (92)c,d
45 (23)
c
63 (61)
31 (84)c,d
10 (5)
44 (43)c
26 (70)c,d
14 (7)
22 (21)c
Seizure during hospitalization, n (%)
Inpatient nutrition, n (%)
Inpatient consults, n (%)
3 (10)a
Physical therapy
a
Occupational therapy
2 (7)
Speech therapy
0a
Psychology
0
7 (19)
Hospital days, median (IQR)
1.9 (1.2–2.8)
2.1 (1.4–4.6)
8.6 (5–14.3)c
14.9 (10.5–20.3)c,d
Critical care days, median (IQR)
1.7 (1.2–2.7)
1 (0.7–1.7)
3.1 (1.6–6.2)c
6.4 (2.9–12.8)c,d
63.3 (44.2–73.6)
10 (3.5–64.9)
Mechanical ventilation hours, median (IQR)
a
59.2 (16.5–138.7)c
137 (72.2–222)c,d
New disability is defined by a change in FSS total score of $1 from baseline; severe disability is defined by a change in FSS total score of $3 from baseline. Groups
were compared by using x 2 tests (with Fisher’s exact for cells with expected N , 10) for categorical variables and Mann-Whitney U tests for continuous variables.
a
P , .05 when comparing the overall PNCC cohort by hospital death.
b
Multiple preadmission chronic conditions found in 52 (16%) patients overall.
c
P , .05 when compared with survivors without new disability (n 5 192).
d
P , .05 when compared with all other survivors (n 5 258).
e
Multiple critical care interventions in some patients. The neurosurgical intervention category includes decompressive craniectomy or hematoma evacuation; the
hemodynamic intervention category includes fluid resuscitation or inotropic or vasopressor support.
care patients with a neurologic diagnosis
had FSS changes of $3 but noted variability
between centers. We found that 13% of all
PNCC admissions had FSS changes of $3,
but this varied from 3% to 33% depending
on the diagnosis. A TBI study focused on
those receiving critical care interventions
showed that 37% had FSS changes of $3,14
HOSPITAL PEDIATRICS Volume 9, Issue 12, December 2019
similar to the 35% we found in patients with
severe TBI. Ahmed et al13 reported that 11%
of all children treated for traumatic injuries
requiring pediatric critical care had FSS
963
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Medicaid insurance, n (%)
TABLE 3 FSS Domain Changes Among Survivors With a New Disability
FSS Domain
All Survivors
N 5 103 (%)
Trauma
n 5 56 (%)
Status Epilepticus
n 5 10 (%)
Infectious and/or
Inflammatory
n 5 21 (%)
Cardiac Arrest
n 5 5 (%)
Stroke
n 5 11 (%)
D $3
Any D
D $3
Any D
D $3
Any D
D $3
Any D
D $3
Any D
D $3
15 (15)
6 (6)
7 (13)
2 (4)
2 (20)
1 (10)
2 (10)
0
2 (40)
2 (40)
2 (18)
1 (9)
Sensory
53 (52)
4 (4)
37 (66)
1 (2)
3 (30)
0
8 (38)
0
3 (60)
2 (40)
2 (18)
1 (9)
Communication
39 (38)
3 (3)
20 (36)
1 (2)
4 (40)
0
8 (38)
0
2 (40)
1 (20)
5 (46)
1 (9)
Motor
49 (48)
10 (10)
24 (43)
5 (9)
1 (10)
1 (10)
12 (57)
1 (5)
2 (40)
2 (40)
10 (91)
1 (9)
Feeding
41 (40)
9 (9)
18 (32)
4 (7)
6 (60)
1 (10)
7 (33)
1 (5)
4 (80)
2 (40)
6 (55)
1 (9)
Respiratory
12 (12)
2 (2)
6 (11)
1 (2)
3 (30)
1 (10)
0
0
2 (40)
0
1 (9)
0
Columns do not sum to 100% because multiple domains can be impaired per patient. Counts and percentages reflect the number of patients with any change in the
FSS domain from the patient’s preadmission baseline and the number with changes of 3 or more in each domain. D, change in FSS domain from preadmission
baseline.
eumatologic diagnoses.
changes of $3 and that concurrent head
injuries increased risk for morbidity. Our
study is the first to systematically apply the
FSS at the diagnosis level for other
nontraumatic PNCC diagnoses.
Similar to previous studies, most children
requiring PNCC admission had normal
functional baselines in our study.13,14
Therefore, we also evaluated disability as
defined by smaller changes in FSS than
previous studies to better quantify the
breadth of morbidities these children suffer.
Using our definition of FSS increases of
$1 from baseline, the prevalence of new
disability after PNCC increased substantially
to 35% (range 14%–53% by diagnosis). We
believe these small FSS changes are
important at the individual patient level
when considering risk for ongoing health
care needs and reduced quality of life20–24
and are important considerations for
clinicians. Changes of 1 point among
previously healthy children are substantial
and correspond to suspected hearing or
vision loss, need for oxygen or suctioning,
need for age-inappropriate help with
feeding, or functional impairment of 1 limb
depending on the domain affected.11 These
data can be used in future studies aimed at
reducing disability after PNCC.
Our study adds granularity to outcomes
data by using the FSS. The 6 domains of the
FSS offer approximations of activities of
daily living and correlate with results of
comprehensive adaptive behavior testing.11
Evaluating outcomes at the FSS domain
964
level, we found that all domains are affected
after PNCC, and patients often have
disabilities in multiple domains. The wide
breadth of morbidities found by using FSS,
coupled with knowledge about cognitive,
emotional, and psychosocial morbidities
after ICU hospitalization,24–28 suggests that a
multidisciplinary approach to patient followup is needed to adequately care for these
children. Despite the high rate of new
disability in multiple domains, ,10% of our
patients were discharged to inpatient
rehabilitation facilities. Currently few
institutions offer systematic follow-up care
in PNCC survivors that can provide this type
of comprehensive care outside of a
rehabilitation setting, although increasing
recognition of long-term sequelae is driving
the development of longitudinal
programs.3,17,29,30 Our study underscores the
need for developing systematic support for
patients and families after discharge.
Few interventions have been shown to
improve outcomes in PNCC, and intervention
studies in this population are hindered by
limited knowledge of outcomes and risk
factors.1 With our study, we explored risk
factors that could be used to predict
outcomes or targeted in future intervention
studies. Not surprisingly, markers of illness
severity, such as need for critical care
interventions, lower Glasgow Coma Scale
score in TBI, and increased CPR duration in
cardiac arrest, were associated with worse
outcomes, similar to previous studies.14,31–34
However, we also identified seizures during
admission as a risk factor for worse
outcomes in the overall cohort as well as
among individual diagnoses. Seizures may
represent worse primary brain injury, but
seizures can also lead to secondary brain
injury and may serve as a modifiable target
to improve outcomes. Although our
institution has guidelines for seizure
prophylaxis and EEG monitoring in patients
with TBI, we did not systematically evaluate
EEG for other diagnoses and, notably, may
have underdiagnosed subclinical seizure
activity. Seizure burden is linked to worse
outcomes in the PICU population,35 and our
results further support guidelines for
systematic EEG monitoring in PNCC.36 It
remains unknown if interventions targeting
seizures can improve outcomes.
Our study has several limitations to
consider, including the single-center setting
when admission characteristics,
treatments, and outcomes in PNCC patients
may vary by region and center.3,4,37–39 Our
results are likely comparable to other
academic tertiary children’s hospitals and
level 1 pediatric trauma centers but may not
represent PNCC populations at all
institutions. PNCC diseases are individually
rare, and many of the diagnoses we
evaluated had low numbers of admissions,
even over 2 years, limiting comprehensive
evaluation of risk factors for worse
outcomes, particularly among diagnosis
subgroups. Future studies should evaluate
correlates between FSS changes and
neuroimaging, EEG, and biomarkers in
larger cohorts to further refine risk factors.
Additionally, more than three-quarters of
WILLIAMS et al
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Any D
Mental status
CONCLUSIONS
More than one-third (35%) of PNCC
survivors have new disability when
evaluating changes in FSS from baseline,
and outcomes vary significantly with
primary diagnosis. All functional domains
measured by the FSS can be affected after
PNCC, and patients with new disability often
have multiple domains affected
concurrently, underscoring the ongoing
need for multidisciplinary care after
discharge. Future studies should determine
the longitudinal course of recovery in FSS
after discharge and evaluate risk factors for
worse outcomes in larger multicenter
populations to identify targets for future
intervention.
Acknowledgments
This research used resources supported by
the Oregon Clinical and Translational
Research Institute (grant UL1RR024140)
from the National Center for Research
Resources, a component of the National
Institutes of Health, and the National
Institutes of Health Roadmap for Medical
Research.
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