CDC分析4,861例婴儿突然意外死亡：至少73%涉及不安全睡眠因素，美国每年约3,400名婴儿因此死亡
美国疾病控制与预防中心（CDC）2026年9月10日在《发病率与死亡率周报》（MMWR）发表分析报告：研究人员汇总2020年至2024年间美国31个辖区登记的4,861例婴儿突然意外死亡（SUID）病例，发现其中至少73%存在不安全睡眠因素；婴儿突然意外死亡涵盖婴儿猝死综合征、睡眠中意外窒息与勒颈以及原因不明死亡，美国每年约有3,400名1岁以下婴儿因此死亡。
从病例构成看，死亡婴儿中66%为0至3个月大，57%为男婴，38%为非裔、37%为白人，74%为足月出生（孕周满37周），69%由联邦医疗补助（Medicaid）承保。CDC的病例登记系统覆盖32个辖区、约占全美同类死亡的五分之二，数据来自儿童死亡审查等多源记录，包含普通死亡统计所没有的睡眠环境细节。
睡眠环境是不安全因素最集中的环节：78%的死亡婴儿睡在有柔软寝具的环境中，75%睡在婴儿床以外的表面上，59%与他人同享睡眠表面，46%被发现时不是仰卧姿势，28%有完整的气道阻塞记录（口鼻、颈部或胸部受压）。按CDC分类算法，19%的病例被归为「已解释的窒息死亡并伴不安全睡眠因素」，其中柔软寝具造成的气道阻塞占74%、被人体或动物压覆占24%、卡在两物之间占8%。
美国儿科学会（AAP）为降低此类死亡风险，建议婴儿仰卧睡在平坦、坚实的独立睡眠表面（婴儿床或摇篮）上，睡眠区不放柔软寝具。报告指出，1990年代全美SUID发生率曾随安全睡眠宣传显著下降，但2020年至2022年间又从每10万活产92.9例回升至100.9例，进展停滞。
死亡调查方面，98%的病例做了尸检、98%有死亡调查，毒理学检测占95%、影像学占89%；但仅50%的调查记录了由发现者参与的死亡现场重演，15%的病例缺少被发现时体位信息、33%缺少气道阻塞状况信息。报告作者指出，登记数据可帮助各地识别高风险人群与本地风险因素，制定针对性的预防措施；同时提醒，本分析仅覆盖参与登记的31个辖区、约占全美SUID的四成，结果不能完全推广至全国。
CDC Analysis of 4,861 Sudden Unexpected Infant Deaths: At Least 73% Involved Unsafe Sleep Factors, With About 3,400 U.S. Infant Deaths Each Year
The U.S. Centers for Disease Control and Prevention (CDC) published an analysis in Morbidity and Mortality Weekly Report (MMWR) on September 10, 2026: researchers reviewed 4,861 sudden unexpected infant deaths (SUIDs) recorded across 31 jurisdictions during 2020-2024 and found that at least 73 percent involved unsafe sleep factors. SUID includes sudden infant death syndrome, accidental suffocation and strangulation in bed, and deaths of unknown cause, and accounts for approximately 3,400 deaths among U.S. infants under age 1 each year.
Most decedents were aged 0-3 months (66 percent), male (57 percent), Black or African American (38 percent) or White (37 percent), born full-term at 37 or more weeks of gestation (74 percent), and insured by Medicaid (69 percent). The CDC case registry covers 32 jurisdictions and captures roughly two in five U.S. SUIDs, compiling sleep-environment details that vital statistics alone do not contain.
Unsafe sleep factors were common: 78 percent of the infants had soft bedding in the sleep environment, 75 percent were on a surface other than a crib, 59 percent were sharing a sleep surface, 46 percent were found in a nonsupine position, and 28 percent had documented full airway obstruction. Under the registry classification algorithm, 19 percent were categorized as explained suffocation with unsafe sleep factors; among those, soft bedding accounted for 74 percent of attributed mechanisms, overlay by a person or animal for 24 percent, and wedging for 8 percent.
The American Academy of Pediatrics recommends that infants sleep supine on a flat, firm, nonshared surface such as a crib or bassinet, without soft bedding. The report notes that U.S. SUID rates fell during the 1990s as safe-sleep guidance spread, but rose again from 92.9 to 100.9 per 100,000 live births between 2020 and 2022.
Nearly all cases had an autopsy (98 percent) and a death investigation (98 percent), including toxicology testing (95 percent) and imaging (89 percent), yet only 50 percent documented a death-scene re-creation and information on found position or airway obstruction was missing in 15 percent and 33 percent of cases. The authors note the registry population, drawn from 31 jurisdictions and about 40 percent of U.S. SUIDs, is not fully generalizable nationwide.
来源：GSM·美国（原文链接）
图片来源：图：婴儿游戏床与摇篮（资料图）。图片来源：Famartin 摄，Wikimedia Commons，CC BY-SA 4.0。Photo: An infant play yard and bassinet (illustrative). Credit: Famartin, Wikimedia Commons, CC BY-SA 4.0.
