On the other hand, the results in the fixed-effects model did not reach statistical significance, with a remarkable attenuation of changes in BMI: 0.07 kg/m 2 (95% CI −0.03–0.18) for those who slept 5 hours per night; 0.02 kg/m 2 (95% CI −0.06–0.11) for those who slept 6 hours per night; and 0.06 kg/m 2 (95% CI −0.11–0.24) for those who slept 8 or more hours per night.
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