Predischarge Car Seat Tolerance Screening in Preterm and At-Risk Full-Term Infants: A Systematic Review and Meta-Analysis.

Abstract

Predischarge car seat tolerance screening (CSTS) has been recommended by the American Academy of Pediatrics since 1991 for preterm and at-risk full-term-born infants. However, it remains unclear whether routine CSTS prevents adverse outcomes after discharge. To estimate the frequency of failed CSTS and its association with adverse postdischarge outcomes. PubMed, Embase, and Web of Science were searched for English-language studies published before June 2025. Randomized trials, nonrandomized intervention studies (utilizing a comparison group discharged without CSTS), and single-group observational studies were eligible. Data were extracted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses reporting guideline by 2 reviewers. Study quality was assessed using the Risk of Bias in Nonrandomized Studies tool. Outcomes were 30-day readmission, mortality, and predischarge length of stay for intervention studies, and first and subsequent CSTS failure rates for single-group studies. Random-effects models were used to pool data, and generalized linear mixed models were used to estimate pooled treatment effects from 2-group studies and CSTS failure event rates from all included studies. A total of 21 studies were included. No randomized trials were identified. Three nonrandomized intervention studies (54 358 participants; 27 786 participants without CSTS) reported postdischarge outcomes. There was no difference in 30-day mortality (2 studies; not pooled due to 0 events), 30-day readmissions (odds ratio, 1.05; 95% CI, 0.86-1.28; 3 studies; 54 559 participants), or combined 30-day mortality or readmission (odds ratio, 1.17; 95% CI, 0.95-1.43; 2 studies; 49 420 participants) among infants receiving predischarge CSTS compared with those that did not. Pooled analysis estimated 8.62 (95% CI, 6.42-11.47) first-test failures per 100 patients (21 studies; 39 052 participants) and 24.40 (95% CI, 6.44-34.64) repeat-test failures per 100 patients (11 studies; 912 participants). In this systematic review and meta-analysis of predischarge CSTS for preterm and at-risk full-term-born infants, CSTS was not associated with a reduction in postdischarge readmission or mortality. These findings call into question whether routine CSTS before discharge improves outcomes in preterm or at-risk full-term infants.