Objective Sleep in Atopic Dermatitis: A Meta-Analysis.

The evidence regarding objective sleep especially for the sleep architecture in atopic dermatitis (AD) was limited and not well summarized. To determine the objective sleep in AD patients as well as its confounders. We searched PubMed/Medline, Embase, and PsycInfo up to May 2021. Case-control studies or cohort studies that recruited AD patients and healthy controls and reported objective sleep parameters assessed by polysomnography or actigraphy were included. A total of 7 studies with 173 AD patients and 122 controls were analyzed. Specifically, AD patients have significantly decreased total sleep time (TST, -13.797 minutes) and sleep efficiency (SE, -5.589%) accompanied by prolonged wake time after sleep onset (WASO, 29.972 minutes) and rapid eye movement sleep latency (31.894 minutes, all  < 0.05). Furthermore, subgroup analyses showed more WASO in severe AD subgroup compared with nonsevere AD subgroup (51.323 minutes vs 20.966 minutes,  = 0.032), less SE in male-majority subgroup compared with female-majority subgroup (-9.443% vs -4.997%,  = 0.018), and less TST in adult subgroup compared with child subgroup (-41.045 vs -4.016 minutes,  = 0.037). Objective sleep was worse in AD patients, especially among patients with severe AD, males, and adults. AD appears to more predispose difficulty in sleep maintenance rather than falling asleep.