Table 3.
HR and 95% CI for incident obesity during the follow-up in 10,532 participants according to sleeping hours/day, stratified by previous 5-year weight gain: the SUN cohort 1999–2011
| Sleeping hours/day |
|||||
|---|---|---|---|---|---|
| <5 | 5 to <7 | 7 to<8 | ≥8 | p quadratic trend | |
| Weight gain < 3k g | |||||
| Person years | 1,222 | 10,328 | 20,623 | 13,477 | |
| Incident cases | 5 | 56 | 95 | 52 | |
| Crude HR (95% CI) | 0.89 (0.36–2.20) | 1.18 (0.50–1.65) | 1.00 Ref. | 0.84 (0.60–1.18) | 0.37 |
| Age-sex-adjusted HR (95% CI) | 0.89 (0.36–2.19) | 1.15 (0.83–1.61) | 1.00 Ref. | 0.93 (0.66–1.30) | 0.70 |
| Multivariable HRa (95% CI) | 0.83 (0.34–2.07) | 1.06 (0.76–1.48) | 1.00 Ref. | 0.91 (0.65–1.28) | 0.85 |
| Multivariable HRb (95% CI) | 1.03 (0.40–2.61) | 0.99 (0.70–1.39) | 1.00 Ref. | 0.95 (0.67–1.38) | 0.99 |
|
| |||||
| Weight gain ≥ 3kg | |||||
| Person years | 813 | 5,218 | 10,741 | 6,991 | |
| Incident cases | 14 | 67 | 92 | 65 | |
| Crude HR (95% CI) | 2.06 (1.17–3.61) | 1.53 (1.14–2.09) | 1.00 Ref. | 1.08 (0.79–1.49) | 0.009 |
| Age-sex-adjusted HR (95% CI) | 2.09 (1.19–3.67) | 1.53 (1.12–2.10) | 1.00 Ref. | 1.15 (0.84–1.59) | 0.01 |
| Multivariable HRa (95% CI) | 2.05 (1.14–3.68) | 1.48 (1.08–2.04) | 1.00 Ref. | 1.22 (0.89–1.68) | 0.03 |
| Multivariable HRb (95%CI) | 3.36 (1.82–6.21) | 1.43 (1.03–1.98) | 1.00 Ref. | 1.39 (1.00–1.93) | 0.001 |
a
Adjusted for age, sex, smoking status, physical activity, time spent sitting down, fast food, sugared soft drinks, snacking between meals, total energy intake, caffeine, alcohol, snoring, insomnia and siesta hours.
b
Additionally adjusted for baseline BMI.