Survey dataset.

Introduction
Bedsharing is common but advised against by the American Academy of Pediatrics. It is unknown if breastfeeding physicians bedshare more or less than the general population.
Objectives
To determine the prevalence of bedsharing among physicians, their reasons for bedsharing or not, and whether bedsharing was associated with a longer duration of breastfeeding.
Methods
An online survey was adapted from surveys administered by the Centers for Disease Control and Prevention. The survey was administered to physicians and medical students who birthed children from October 2020 through August 2021. Respondents were asked to report on a singleton birth, and questions centered around sleep practices and breastfeeding. Survival analysis was used to examine the association between bedsharing and breastfeeding duration.
Results
Of 546 respondents with bedsharing data, 68% reported some history of bedsharing, and 77% were in specialties that involved caring for pregnant people and/or infants. Those who bedshared breastfed an average of four months longer than those who never bedshared (18.08 versus 14.08 months p<0.001). The adjusted risk of breastfeeding cessation was markedly lower for those who bedshared compared to those who did not (Hazard Ratio 0.57, 95% Confidence Interval 0.45, 0.71). The primary reason for bedsharing was to breastfeed (73%); the primary reason for not bedsharing was safety concerns (92%). Among those who bedshared (n = 373), 52% did not inform their child’s healthcare provider.
Conclusions
Bedsharing is common among our sample of mainly breastfeeding physicians, including those who care for pregnant people and/or infants. It is also associated with a longer duration of breastfeeding, which has implications for population health. Practicing bedsharing implies cognitive dissidence and may affect how physicians counsel about bedsharing. Additionally, lack of disclosure of bedsharing practices has implications for practical guidance about having open non-judgmental conversations and may be a missed opportunity to counsel on bedsharing safety.

引言
同床睡眠（bedsharing）行为较为普遍，但美国儿科学会（American Academy of Pediatrics）明确反对该行为。目前尚不明确母乳喂养医师的同床睡眠频率是否高于或低于普通人群。

研究目的
明确医师群体中同床睡眠的流行率、受访者选择同床睡眠或避免同床睡眠的原因，以及同床睡眠是否与更长的母乳喂养持续时长相关。

研究方法
本研究采用改编自美国疾病控制与预防中心（Centers for Disease Control and Prevention）所发布问卷的在线调查问卷。本次调查的对象为2020年10月至2021年8月期间生育过子女的医师与医学生。要求受访者报告其单胎生育经历，问卷内容围绕睡眠习惯与母乳喂养情况展开。本研究采用生存分析（survival analysis）方法，探究同床睡眠与母乳喂养持续时长之间的关联。

研究结果
在546名提供同床睡眠相关数据的受访者中，68%表示曾有过同床睡眠经历，77%的受访者所在专科涉及孕产妇及/或婴幼儿照护工作。曾有同床睡眠经历的受访者，其母乳喂养平均时长较从未同床睡眠者多出4个月（分别为18.08个月与14.08个月，p<0.001）。经校正后，同床睡眠者的母乳喂养终止风险显著低于非同床睡眠者（风险比（Hazard Ratio）为0.57，95%置信区间（Confidence Interval）为0.45~0.71）。同床睡眠的首要原因为进行母乳喂养（占比73%）；而选择不同床睡眠的首要原因为安全顾虑（占比92%）。在曾有同床睡眠经历的受访者（n=373）中，52%未告知孩子的医疗照护人员其同床睡眠行为。

结论
在本次以母乳喂养相关医师为主体的研究样本中，同床睡眠行为较为普遍，其中涵盖了从事孕产妇及/或婴幼儿照护工作的医师群体。该行为同时与更长的母乳喂养持续时长相关，这一结果对公共卫生具有一定启示意义。医师自身践行同床睡眠行为，意味着其存在认知相悖性，这或会影响其就同床睡眠问题提供咨询建议的方式。此外，受访者未披露自身同床睡眠行为的情况，为开展开放且不带评判的对话提供了实践指导层面的启示，同时也提示我们可能错失了就同床睡眠安全提供咨询建议的契机。