Validation of the Chinese version of Morningness-Eveningness Questionnaire for screening delayed sleep-wake phase disorder with bipolar disorder among Han Chinese population (opens in new tab)

ObjectiveDelayed sleep-wake phase disorder (DSWPD) is commonly seen in bipolar disorder (BD). However, valid screening tools for DSWPD have not been available, especially in China. Therefore, this study aimed to explore the validation of the Morningness-Eveningness Questionnaire (MEQ) for screening DSWPD with BD among Han Chinese population.MethodsA total of 267 patients with bipolar disorder and 130 healthy controls were screened with the Chinese version of Morningness-Eveningness Questionna...