Abusive head trauma (AHT) in infants is thought to be triggered by caregiver frustration with persistent crying. The Period of PURPLE Crying (POPC) is designed to educate parents about normal infant crying, strategies to use when infants cry and the dangers of shaking in an effort to decrease AHT. Studies evaluating the POPC have measured changes in parent knowledge and behaviour regarding infant crying. Our objective was to evaluate the POPC's effect on caregiver frustration with infant crying compared to standard discharge information (SDI). We taught paediatric interns and medical students rotating in the newborn nursery to deliver the POPC and discuss infant crying. New parents were pseudo‐randomised to receive SDI or the POPC plus SDI. Parents were contacted five‐to‐eight weeks after discharge and asked knowledge questions about infant crying as well as the number of times that they were frustrated by their infant's crying in the preceding week. Of 271 parents who consented to participate, 164 (61%) completed the survey. The POPC group answered two of the knowledge questions correctly more often than the control group (score differences: 17%, 95% confidence interval (CI) 3–32% and 21%, 95% CI 7–36%). However, parents reported frustration due to infant crying at similar rates between the control (55/80, 69%) and POPC (60/84, 71%) groups. Our results support previous findings that the POPC improves caregiver knowledge concerning infant crying. The POPC does not appear to affect caregiver frustration with crying.

中文翻译：

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评估紫色哭泣的时间：预防颅脑外伤计划

婴儿的虐待性头部外伤（AHT）被认为是护理人员对持续性哭泣的挫败感所致。紫色哭泣期（POPC）旨在教育父母有关正常的婴儿哭泣，婴儿哭泣时使用的策略以及为降低AHT而摇晃的危险。评估POPC的研究测量了有关婴儿哭泣的父母知识和行为的变化。我们的目标是与标准出院信息（SDI）相比，评估POPC对婴儿哭泣引起的看护人沮丧的影响。我们教儿科实习生和医学生在新生儿保育室中轮流授课，以传递POPC并讨论婴儿哭泣的问题。新父母被伪随机地接受SDI或POPC加SDI。出院后五到八周与父母联系，询问有关婴儿哭泣的知识问题，以及前一周因婴儿哭泣而感到沮丧的次数。在271位同意参加的父母中，有164位（61％）完成了调查。POPC组比对照组更正确地回答了两个知识问题（得分差异：17％，95％置信区间（CI）为3–32％和21％，95％CI为7–36％）。然而，父母报告称由于婴儿哭泣而感到沮丧，而对照组（55 / 80，69％）和POPC（60 / 84，71％）的哭泣率相似。我们的结果支持以前的发现，即POPC可以提高护理人员对婴儿哭泣的了解。POPC似乎不影响护理人员的哭泣挫败感。