Table 5.

Mean differences in the 10-word recall test score (95% confidence interval) by insomnia

	Insomnia		P
	No	Yes
No. of subjects	23,884	4,779	–
Crude model	Ref.	−0.06 (−0.12 to −0.01)	0.03
Model 1	Ref.	−0.10 (−0.16 to −0.05)	< 0.001
Model 2	Ref.	−0.08 (−0.14 to −0.02)	0.01

Model 1: adjusting for age and sex, employment, occupation, education, smoking, drinking, physical activity, tea consumption, and self-rated health

Model 2: adjusting for age, sex, employment, occupation, education, smoking, drinking, physical activity, tea consumption, self-rated health, waist circumference, HDL- and LDL-cholesterol, fasting plasma glucose, systolic blood pressure, sleeping duration, napping, and morning tiredness.