Independent association between the level of physical activity and medical disorders, insomnia symptoms, daytime sleepiness and sleep duration expressed as adjusted* ORs (95% CI) with the persistently non-active group as reference
| Became inactive (n=881) | Became active (n=775) | Persistently active (n=1082) | |
| Insomnia symptoms | |||
| Difficulties initiating sleep | 0.97 (0.75–1.25) | 0.82 (0.62–1.08) | 0.58 (0.42–0.77) |
| Difficulties maintaining sleep | 0.96 (0.80–1.17) | 1.04 (0.85–1.27) | 0.80 (0.66–0.97) |
| Early morning awakenings | 1.09 (0.87–1.38) | 0.86 (0.63–1.03) | 0.80 (0.63–1.03) |
| Any insomnia symptom | 1.02 (0.85–1.22) | 0.95 (0.78–1.14) | 0.78 (0.65–0.94) |
| Number of insomnia symptoms | |||
| 1 | 1.07 (0.86–1.32) | 0.99 (0.79–1.24) | 0.91 (0.74–1.12) |
| 2 | 0.89 (0.66–1.20) | 0.86 (0.63–1.17) | 0.60 (0.43–0.82) |
| 3 | 1.09 (0.74–1.59) | 0.94 (0.62–1.42) | 0.63 (0.41–0.98) |
| Daytime sleepiness | |||
| Epworth Sleepiness Scale score >10 | 1.17 (0.94–1.47) | 1.00 (0.78–1.27) | 0.87 (0.69–1.10) |
| Sleep duration | |||
| Short sleepers (≤6 hours) | 0.89 (0.73–10.7) | 0.85 (0.69–1.03) | 0.71 (0.58–0.85) |
| Normal sleepers (6–9 hours) | 1.18 (0.98–1.42) | 1.21 (1.00–1.47) | 1.55 (1.29–1.87) |
| Long sleepers (≥9 hours) | 0.74 (0.47–1.17) | 0.84 (0.53–1.33) | 0.48 (0.28–0.80) |
Bold text indicates statistical significance.
*Adjusted for age, sex, body mass index (BMI), smoking history and centre.