Relationships between three and twelve month outcomes in children enrolled in the therapeutic hypothermia after pediatric cardiac arrest trials

Resuscitation. 2019 Jun;139:329-336. doi: 10.1016/j.resuscitation.2019.03.020. Epub 2019 Mar 26.


Aim: To inform design aspects of future trials by comparing 3 and 12-month neurobehavioural outcomes in children enrolled in Therapeutic Hypothermia After Pediatric Cardiac Arrest Out-Of-Hospital and In-Hospital (THAPCA-OH, THAPCA-IH) trials.

Methods: The THAPCA trials evaluated two targeted temperature management interventions (hypothermia, 32.0-34.0 °C; normothermia, 36.0-37.5 °C). Children, aged 2 days to <18 years, were enrolled from 2009-2015. Three and 12-month post-cardiac arrest (CA) outcomes included the Vineland Adaptive Behavior Scales, Second Edition (VABS-II) (population mean = 100, SD = 15) and the pediatric cerebral performance category (PCPC) scale. Children without significant pre-existing neurodevelopmental deficits were included in primary outcome analyses. Among survivors, favorable 12-month outcome was defined as VABS-II ≥ 70.

Results: VABS-II and PCPC were available at 3 and 12 months in 204 of 222 eligible survivors (THAPCA-OH, n = 82; THAPCA-IH, n = 122). Relative to THAPCA-IH, THAPCA-OH had significantly less pre-CA disability and significantly greater 12-month CA impairment, based on both VABS-II and PCPC. Correlations between 3 and 12-month VABS-II scores were strong for THAPCA-OH (r = 0.95) and THAPCA-IH (r = 0.72), and lower (p ≤ 0.001) in THAPCA-IH. Between time-points correlations were lower, but still significant in children <1 year at CA (p < 0.001). In both cohorts, 3-month VABS-II and PCPC categorical outcomes had high sensitivity (≥70%) for predicting favorable 12-month VABS-II outcomes, but specificity was lower for THAPCA-IH (68-89%) relative to THAPCA-OH (≥95%). Overall, 12-month diagnostic accuracy was ≥80% for both VABS-II and PCPC in both cohorts.

Conclusions: In future paediatric cardiac arrest clinical trials that enroll similar cohorts, integration of 3-month neurobehavioral outcome measures should be considered.

Trial registration: NCT00878644 NCT00880087.

Keywords: Cardiac arrest; Neurobehavioral; Outcome; Pediatrics.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adolescent
  • Child
  • Child, Preschool
  • Clinical Trials as Topic
  • Female
  • Heart Arrest / therapy*
  • Humans
  • Hypothermia, Induced*
  • Infant
  • Infant, Newborn
  • Male
  • Outcome Assessment, Health Care
  • Prospective Studies
  • Time Factors

Associated data