Table 3.

Effect of BMI on sleep quailty in long-lived subjects

Characteristics	Diagnostic criteria in BMI								Quartile of (BMI)
	Underweight		Normal weight		Overweight		Obese		Under 16.6		16.6–18.9		18.9–21.1		Above 21.1
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Unadjusted	1.500 (0.386–5.834)		1.182 (0.305–4.584)		1.636 (0.373–7).187		1.000	(reference)	1.050 (0.610–1.808)		1.083 (0.627–1.871)		0.846 (0.499–1.435)		1.000	(Reference)
Model 1	1.561 (0.383–6.212)		1.111 (0.278–4.259)		1.598 (0.376–7.412)		1.000	(reference)	1.210(0.658–2.213)		1.003(0.515–1.718)		0.801(0.464–1.371)		1.000	(Reference)
Model 2	3.082 (0.679–13.908)		2.375(0.514–10.003)		3.222(0.549–15.678)		1.000	(reference)	1.123(0.638–2.002)		1.167 (0.675–2.175)		0.953(0.562–1.675)		1.000	(Reference)
Model 3	2.765(0.514–12.789)		2.107 (0.421–9.505)		2.784(0.538–13.651)		1.000	(reference)	1.228 (0.646–2.307)		1.086(0.597–1.989)		0.887 (0.501–1.623)		1.000	(Reference)

OR odds ratio, Unadjusted Wald Chi-square test with df = 1 was used, adjusted multiple logistic regression was used to adjust for covariates, model 1 adjustment made with the other components of metabolic syndrome (waist circumference, blood pressure, serum lipid/lipoprotein, blood sugar, uric acid), model 2 adjustment made with lifestyles (smoking habits, alcoholic, tea habits, exercise habits), model 3 adjustment made with age, gender, nap in daytime, cognitive function and all factors above

*P < 0.05, **P < 0.01