Self-reported and objective sleep duration in patients with CKD: are they telling the same story?

Abstract Introduction: There is disagreement between data on sleep duration obtained from questionnaires and objective measurements. Whether this is also true for individuals with CKD is unknown. Here we compared self-reported sleep duration with sleep duration obtained by actigraphy. Methods: This prospective study included adult individuals with stage 3 CKD recruited between September/2016 and February/2019. We evaluated subjective sleep duration by asking the following question: “How many hours of actual sleep did you get at night?” Results: Patients (N=34) were relatively young (51 ± 13 years). Self-reported and measured sleep duration were 7.1 ± 1.7 and 6.9 ± 1.6 hours, respectively, with no correlation between them (p=0.165). Although the mean difference between measurements was 0.21 h, the limits of agreement ranged from -3.7 to 4.1 h. Conclusion: Patients with CKD who are not on dialysis have an erroneous sleep perception. Data on sleep duration should be preferentially obtained from objective measurements in patients with CKD.

摘要
引言：关于睡眠时长的数据，源自问卷的主观调查与客观测量之间存在分歧。至于慢性肾脏病（CKD）患者是否亦然，尚无明确结论。本研究中，我们对自我报告的睡眠时长与通过动作描记法获得的睡眠时长进行了比较。
方法：本前瞻性研究纳入了2016年9月至2019年2月招募的3期CKD成人患者。我们通过以下问题评估了主观睡眠时长：‘您在夜间实际睡眠了多少小时？’
结果：患者（N=34）年龄相对较轻（51 ± 13岁）。自我报告的睡眠时长与测量值分别为7.1 ± 1.7和6.9 ± 1.6小时，两者之间无显著相关性（p=0.165）。尽管测量值之间的平均差异为0.21小时，但其一致性界限介于-3.7至4.1小时之间。
结论：未接受透析治疗的CKD患者存在睡眠感知错误。在CKD患者中，睡眠时长的数据应优先通过客观测量方式获取。