Table 2 Cross-sectional analysis of association of sleep duration and insomnia with metabolic syndrome and its components using logistic regression models

Baseline sleep duration (hours)

 < 6

1.01 (0.83–1.24)

0.98 (0.80–1.20)

1.05 (0.87–1.28)

1.03 (0.84–1.25)

0.97 (0.80–1.18)

0.97 (0.79–1.18)

1.16 (0.94–1.43)

1.11 (0.89–1.37)

0.95 (0.77–1.18)

0.92 (0.74–1.14)

1.06 (0.86–1.29)

1.05 (0.85–1.29)

 6- < 7

1.04 (0.90–1.21)

1.03 (0.89–1.21)

1.13 (0.98–1.31)

1.13 (0.98–1.31)

0.99 (0.86–1.15)

0.99 (0.85–1.15)

0.99 (0.85–1.17)

0.97 (0.82–1.15)

1.00 (0.86–1.17)

1.00 (0.85–1.17)

1.01 (0.87–1.18)

1.00 (0.86–1.16)

 7- < 8

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 8- < 9

1.06 (0.90–1.26)

1.05 (0.89–1.25)

1.14 (0.97–1.34

1.18 (1.01–1.40)

0.91 (0.77–1.06)

0.90 (0.77–1.06)

1.01 (0.84–1.21)

0.98 (0.82–1.18)

0.94 (0.79–1.13)

0.97 (0.81–1.17)

1.22 (1.04–1.44)

1.23 (1.05–1.46)

 ≥ 9

1.55 (1.15–2.08)

1.51 (1.12–2.04)

1.41 (1.05–1.89)

1.40 (1.04–1.90)

1.35 (1.00–1.87)

1.34 (0.98–1.82)

1.14 (0.83–1.57)

1.08 (0.78–1.50)

1.26 (0.92–1.72)

1.28 (0.93–1.76)

1.42 (1.06–1.92)

1.42 (1.04–1.92)

Baseline sleep quality

 Insomnia

1.14 (1.00–1.30)

1.14 (0.99–1.31)

1.17 (1.03–1.32)

1.18 (1.03–1.34)

1.07 (0.95–1.22)

1.09 (0.96–1.24)

1.18 (1.03–1.35)

1.17 (1.02–1.35)

1.02 (0.89–1.17)

1.03 (0.89–1.18)

1.10 (0.97–1.26)

1.11 (0.97–1.26)