Table 4.
HR and 95% CI for incident obesity during the follow-up in 10,532 participants according to sleeping hours/day, stratified by sex: the SUN cohort 1999–2011
| Sleeping hours/day |
|||||
|---|---|---|---|---|---|
| <5 | 5 to <7 | 7 to<8 | ≥8 | p quadratic trend | |
| Men | |||||
| Person years | 912 | 7,648 | 15,481 | 8,007 | |
| Incident cases | 15 | 77 | 127 | 58 | |
| Crude HR (95% CI) | 2.04 (1.20–3.49) | 1.24 (0.93–1.64) | 1.00 Ref. | 0.88 (0.65–1.20) | 0.01 |
| Age-sex-adjusted HR (95% CI) | 1.98 (1.16–3.39) | 1.22 (0.91–1.62) | 1.00 Ref. | 0.90 (0.66–1.22) | 0.03 |
| Multivariable HR a (95% CI) | 1.91 (1.10–3.32) | 1.18 (0.88–1.57) | 1.00 Ref. | 0.90 (0.66–1.23) | 0.06 |
| Multivariable HR b (95% CI) | 2.09 (1.18–3.69) | 1.03 (0.91–1.45) | 1.00 Ref. | 0.88 (0.64–1.21) | 0.05 |
|
| |||||
| Women | |||||
| Person years | 1,123 | 7,898 | 15,881 | 12,461 | |
| Incident cases | 4 | 46 | 60 | 59 | |
| Crude HR (95% CI) | 0.95 (0.34–2.61) | 1.58 (1.07–2.32) | 1.00 Ref. | 1.27 (0.89–1.82) | 0.13 |
| Age-sex-adjusted HR (95% CI) | 0.94 (0.34–2.59) | 1.58 (1.07–2.32) | 1.00 Ref. | 1.28 (0.89–1.84) | 0.13 |
| Multivariable HR a (95% CI) | 0.95 (0.34–2.62) | 1.43 (0.97–2.12) | 1.00 Ref. | 1.32 (0.92–1.90) | 0.25 |
| Multivariable HR b (95% CI) | 1.26 (0.44–3.57) | 1.34 (0.90–2.00) | 1.00 Ref. | 1.43 (0.97–2.10) | 0.30 |
a
Adjusted for age, 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.