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. 2010 Feb 1;33(2):161–167. doi: 10.1093/sleep/33.2.161

Table 2.

Prospective association of sleep duration with BMI gain* between 2006 and 2007 in men (n = 31,206) and women (n = 3,646)

Model 1‡
 Model 2§
 Model 3
β coefficient 95%CI P value β coefficient 95%CI P value β coefficient 95%CI P value
Sleep Duration (Hours)
    Men
        < 5 0.018 0.035, 0.157 < 0.01 0.017 0.031, 0.153 < 0.01 0.016 0.024, 0.146 < 0.01
        5 to < 6 0.014 0.003, 0.063 0.03 0.014 0.003, 0.063 0.03 0.013 0.001, 0.061 0.04
        6 to < 7 0.006 −0.012, 0.033 0.35 0.006 −0.012, 0.033 0.34 0.006 −0.011, 0.033 0.33
        7 to < 8 0.000 0.000 0.000
        8 to < 9 −0.007 −0.073, 0.018 0.24 −0.007 −0.074, 0.017 0.22 −0.008 −0.075, 0.016 0.20
        ≥ 9 0.018 0.087, 0.349 < 0.01 0.018 0.083, 0.345 < 0.01 0.018 0.079, 0.340 < 0.01
    Women
        < 5 0.009 −0.112, 0.190 0.61 0.010 −0.109, 0.193 0.58 0.010 −0.108, 0.194 0.57
        5 to < 6 0.000 −0.080, 0.082 0.98 0.003 −0.075, 0.087 0.89 0.003 −0.075, 0.087 0.88
        6 to < 7 0.012 −0.048, 0.087 0.57 0.014 −0.045, 0.090 0.52 0.013 −0.046, 0.089 0.53
        7 to < 8 0.000 0.000
        8 to < 9 0.013 −0.088, 0.199 0.45 0.014 −0.086, 0.201 0.43 0.013 −0.087, 0.200 0.44
    ≥ 9 0.021 −0.153, 0.679 0.22 0.020 −0.164, 0.668 0.23 0.020 −0.163, 0.669 0.23

Abbreviations: 95%CI, 95% confidence interval.

*

BMI gain: difference from BMI followed for a year to BMI at baseline.

†

Analysis of BMI gain include all participants.

‡

Model 1: adjusted for age and BMI at baseline.

§

Model 2: adjusted for the variables in model 1 plus shift-worker, smoking, alcohol consumption, and physical activity.

Model 3: adjusted for the variables in model 2 plus depressive symptoms.