Table 3.

Joint cross-sectional association of sleep hours and insomnia with metabolic syndrome and its components at baseline in a sample of women from the Women’s Health Initiative using logistic regression models

	MetS		Waist > 88 cm		Hypertension		Fasting glucose ≥ 100 mg/dL		HDL < 50 mg/dL		Triglycerides ≥ 150 mg/dL
Sleep Duration (hours)	No Insomnia	Insomnia	No Insomnia	Insomnia	No Insomnia	Insomnia	No Insomnia	Insomnia	No Insomnia	Insomnia	No Insomnia	Insomnia
	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)	OR (95%CI)
< 6	1.07 (0.79–1.47)	1.03 (0.79–1.33)	0.97 (0.71–1.32)	1.20 (0.94–1.54)	0.92 (0.68–1.24)	1.01 (0.79–1.29)	1.38 (1.00–1.90)	1.16 (0.89–1.51)	1.03 (0.74–1.42)	0.87 (0.67–1.13)	1.02 (0.74–1.41)	1.06 (0.82–1.36)
6- < 7	0.98 (0.81–1.19)	1.20 (0.98–1.49)	1.03 (0.88–1.27)	1.31 (1.06–1.61)	0.97 (0.81–1.16)	1.01 (0.82–1.25)	1.01 (0.83–1.23)	1.13 (0.90–1.43)	1.02 (0.84–1.24)	1.01 (0.80–1.24)	0.94 (0.78–1.13)	1.16 (0.92–1.43)
7- < 8	ref	1.22 (0.95–1.56)	ref	1.17 (0.92–1.48)	ref	1.08 (0.85–1.36)	ref	1.36 (1.05–1.76)	ref	1.09 (0.85–1.41)	ref	1.10 (0.87–1.40)
8- < 9	1.12 (0.92–1.35)	1.26 (0.86–1.84)	1.21 (1.01–1.57)	1.37 (0.95–1.99)	0.89 (0.74–1.06)	1.10 (0.77–1.59)	1.04 (0.85–1.28)	1.24 (0.83–1.84)	0.93 (0.76–1.14)	1.23 (0.83–1.81)	1.21 (1.01–1.46)	1.53 (1.06–2.20)
≥ 9	1.54 (1.03–2.00)	2.89 (1.39–6.01)	1.42 (1.02–1.98)	1.83 (0.87–3.86)	1.30 (0.94–1.84)	1.51 (0.71–3.24)	1.18 (0.82–1.68)	1.33 (0.61–2.91)	1.21 (0.85–1.72)	1.98 (0.79–3.57)	1.47 (1.04–2.03)	1.35 (0.54–3.41)

Abbreviations:  MetS Metabolic syndrome, HDL high density lipoproteins, OR Odds ratio, CI Confidence interval, ref reference group

Models adjusted for age, ethnicity, educational level, study participation, hormone therapy ever, smoking status, pack-years of smoking, alcohol intake, physical activity, coffee intake, depression, age at menopause and marital status (see Table 2 for details)