Misperception of Sleep Measured by Subjective and Objective Methods and Its Associated Factors in Patients with Type 2 Diabetes Mellitus
Objective To investigate the misperception in subjective and objective sleep duration and sleep latency and analyze their influencing factors in diabetic patients,aiming to provide a reference for sleep-related clinical practice and research in diabetic patients.Methods From September 2019 to September 2021,patients with type 2 diabetes mellitus were se-lected by convenience sampling who visited the En-docrinology Clinic at a Grade Ⅲ-A hospital in Shanghai.Pittsburgh Sleep Quality Index(PSQI)was used to evaluate the sleep quality at baseline(within 1 month);consensus sleep diary and actigraphy(ActiGraph)were used to evaluate subjective and objective sleep status for 7 consecutive days,respectively.A mixed-effect model was used to analyze the potential factors influ-encing the misperception in sleep duration and sleep latency.Results A total of 74 patients were included,with 40(54.1%)experiencing poor sleep quality.The misperception in sleep duration(subjective-objective)was about-8-21 min,and the misperception in sleep onset latency was about 13-24 min.Daily morning sleep quality and baseline sleep quality were significantly correlated with misperception in sleep duration and sleep onset latency(P<0.05).For those with good sleep quality,the misperception in sleep duration and sleep onset latency were about 20 min and 9 min,respectively;for those with poor sleep quality,the misperception were about-4 min and 24 min,respectively.Conclusion Patients with type 2 diabetes mellitus generally have poor sleep quality and misperception in sleep duration and sleep onset latency.These biases are significantly correlated with morning and baseline sleep quality.Although the consensus sleep diary may overestimate sleep duration and sleep onset latency,it generally provides an accurate estimate of mean sleep duration and sleep onset latency over multiple days.Due to its simplicity and accuracy,the consensus sleep diary is recommended for use in future clinical practice studies.However,it is important to consider the impact of overall sleep quali-ty on sleep assessment.
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