Note: CIs, confidence intervals; ORs, odds ratios.
Evening Chronotype: 4-11 score; Neutral Chronotype: 12-17 score; Morning Chronotype: 18-25 score.
P <0.05, ⁎⁎ P <0.01, ⁎⁎⁎ P <0.001.
a Model 1: did not adjust for the covariates.
b Model 2: additionally included age, sex, education, annual incomes, education, passive smoking, physical activity, cause of infertility, living children, and infertility treatment time.
c Model 3: additionally included frequency of insomnia, nocturnal wake frequency, daytime napping, social jetlag, and nighttime sleep duration.
d The trend test was performed by assigning medians to three categories as a continuous variable in the models.
Table 3 . Actor and partner effects of chronotype on depressive symptoms in infertile couples (n = 397 couples)