BACKGROUND Sudden unexpected postnatal collapse (SUPC) is a category of sudden unexpected infant death (SUID), limited to previously well infants born at ≥34 weeks' gestation who die suddenly and unexpectedly at ≤6 days of age. We compared SUPC risk factors to SUID at older ages. METHODS We conducted a retrospective cross-sectional study of 2010-2020 SUID deaths in the National Fatality Review Case Reporting System, excluding SUPC occurring in the birth hospital. Our main outcome was age at death: ≤6 days (SUPC) versus occurring from 7 days old but not having reached their first birthday. We performed multivariable logistic regression using stepwise selection. RESULTS Of 6051 SUID deaths, 98 (1.6%) were SUPC. The median SUPC age was 4 days. A higher percentage of SUPC deaths occurred with surface sharing (73.5% versus 59.6%; odds ratio, 2.74 [1.59-4.73]). Infants who died of SUPC had higher odds of a mother ≥40 years (adjusted odds ratio [aOR], 13.1 [95% confidence interval [CI], 3.3-51.4]), being the first live birth (aOR, 4.0 [95% CI, 2.4-6.9]), being swaddled (aOR, 2.7 [95% CI, 1.7-4.1]), and of dying after their caregiver fell asleep while feeding (aOR, 2.6 [95% CI, 1.6-4.4]). CONCLUSIONS Common SUID risk factors, including surface sharing and prone position, were present in SUPC deaths. However, compared with SUID at older ages, SUPC was associated with older and primiparous mothers, swaddling, and the caregiver falling asleep while feeding the infant. Clinicians should reinforce all American Academy of Pediatrics' safe sleep recommendations and provide guidance regarding situations when parents may fall asleep during a feeding.

中文翻译：

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与突然意外的产后虚脱相关的因素。


背景 出生后意外猝倒 （SUPC） 是婴儿意外猝死 （SUID） 的一类，仅限于妊娠 ≥34 周出生但在 ≤6 天时突然意外死亡的先前健康的婴儿。我们将 SUPC 危险因素与老年人的 SUID 进行了比较。方法 我们在国家死亡审查病例报告系统中对 2010-2020 年 SUID 死亡进行了回顾性横断面研究，不包括发生在分娩医院的 SUPC。我们的主要结局是死亡年龄：≤6 天 （SUPC） 与从 7 天大开始但未达到一岁生日的年龄。我们使用逐步选择进行了多变量 logistic 回归。结果 在 6051 例 SUID 死亡中，98 例 （1.6%） 为 SUPC。中位 SUPC 年龄为 4 天。表面共享的 SUPC 死亡百分比更高（73.5% vs 59.6%;比值比为 2.74 [1.59-4.73]）。死于 SUPC 的婴儿母亲 ≥40 岁 [校正比值比 [aOR]，13.1 [95% 置信区间 [CI]，3.3-51.4]），第一个活产 （aOR，4.0 [95% CI，2.4-6.9]），被包裹（aOR，2.7 [95% CI，1.7-4.1]），以及在照顾者在喂养时睡着后死亡（aOR，2.6 [95% CI，1.6-4.4]）。结论 常见的 SUID 危险因素，包括表面共享和俯卧位，存在于 SUPC 死亡中。然而，与老年人的 SUID 相比，SUPC 与高龄和初产母亲、襁褓以及照顾者在喂养婴儿时睡着有关。临床医生应加强美国儿科学会 （American Academy of Pediatrics） 的所有安全睡眠建议，并就父母在喂养期间可能睡着的情况提供指导。