Table 3.
Multivariate Associations of Baseline Characteristics with Prevalent, Incident, and Persistent Insomnia
| Independent variable | Associations with insomnia outcomes (OR, 95% CI) |
|||
|---|---|---|---|---|
| Prevalence | Incidence | Persistence | Symptom increase | |
| Depression (present) | 1.7 (1.1–2.4) | 2.4 (1.4–4.2) | 1.2 (0.6–2.4) | 1.6 (1.0–2.4) |
| Number of physical disorders | ||||
| 0 | 1.0 | 1.0 | 1.0 | 1.0 |
| 1 | 1.0 (0.7–1.7) | 0.7 (0.4–1.4) | 1.5 (0.5–4.1) | 1.1 (0.7–1.8) |
| 2-3 | 1.5 (0.9–2.3) | 1.7 (0.9–3.0) | 1.6 (0.6–4.1) | 1.2 (0.8–1.9) |
| 4+ | 2.3 (1.4–3.6) | 1.8 (1.0–3.5) | 3.1 (1.2–8.1) | 1.6 (1.0–2.5) |
| Gender (female) | - | - | - | 1.2 (0.9–1.6) |
| Previous education (absent) | - | - | 0.6 (0.4–1.1) | - |
| Housing (rented) | 1.1 (0.7–1.7) | - | 1.6 (0.7–3.6) | - |
| Past occupation (manual) | - | 2.9 (1.2–6.9) | - | 1.5 (0.9–2.7) |
| Current employment (not employed) | 1.1 (0.8–1.5) | - | - | - |
| Living area (urban) | 1.2 (0.9–1.7) | - | - | - |
| Social support deficit (present) | 1.5 (1.1–2.0) | - | - | - |
| Physical activity (inactive) | 1.2 (0.9–1.6) | 1.1 (0.7–1.8) | - | - |
| GMS anxiety (present) | 1.4 (0.6–3.4) | - | - | - |
GMS: Geriatric Mental State Schedule.