The association between chronic insomnia and incident asthma in the Nord-Trøndelag Health Study (HUNT) (1984–2008)
| Subjects | Asthma cases | Model 1# | p-value | Model 2¶ | p-value | Model 3+ | p-value | |
| Chronic insomnia | ||||||||
| No | 10 256 | 361 | Ref. | Ref. | Ref. | |||
| Yes | 65 | 8 | 3.77 (1.65–7.53) | <0.01 | 3.16 (1.37–6.40) | <0.01 | 2.67 (1.15–5.45) | 0.01 |
Data are presented as n or OR (95% CI), unless otherwise stated. Ref: reference. #: adjusted for age and sex; ¶: adjusted for age, sex, body mass index, education, economic difficulty and smoking status; +: adjusted for age, sex, body mass index, education, economic difficulty, smoking status, anxiety and depression.