Table 3.
Multiple logistic regression model for Insomnia Severity Index (ISI) according to subject characteristics
| Characteristics | Model 1 | Model 2 | |||
|---|---|---|---|---|---|
| OR | 95 % CI | OR | 95 % CI | ||
| Sex | Male | 1.0 | 1.0 | ||
| Female | 1.54 | 1.31-1.81 | 1.57 | 1.24-1.97 | |
| Age(years) | 20-29 | 1.0 | 1.0 | ||
| 30-39 | 1.39 | 0.95-2.04 | 1.40 | 0.95-2.06 | |
| 40-49 | 1.74 | 1.22-2.50 | 1.73 | 1.21-2.49 | |
| 50-59 | 2.27 | 1.59-3.25 | 2.17 | 1.51-3.12 | |
| 60-69 | 2.97 | 2.05-4.30 | 2.76 | 1.89-4.02 | |
| 70-74 | 3.88 | 2.52-5.98 | 3.64 | 2.35-5.65 | |
| Education | Never | 1.0 | 1.0 | ||
| Elementary school | 1.07 | 0.64-1.77 | 1.09 | 0.65-1.81 | |
| Middle school | 1.22 | 0.74-2.01 | 1.25 | 0.76-2.07 | |
| High school | 1.15 | 0.70-1.89 | 1.19 | 0.73-1.96 | |
| College or more | 1.17 | 0.69-1.96 | 1.18 | 0.73-1.98 | |
| Residency period(year) | <5 | 1.0 | 1.0 | ||
| 5-9 | 0.93 | 0.75-1.16 | 0.93 | 0.75-1.16 | |
| 10-14 | 1.02 | 0.82-1.27 | 1.01 | 0.81-1.26 | |
| ≥15 | 0.96 | 0.77-1.19 | 0.96 | 0.77-1.19 | |
| Noise exposure group | Control | 1.0 | 1.0 | ||
| Low-exposure | 3.45 | 2.64-4.50 | 3.41 | 2.61-4.46 | |
| High-exposure | 3.24 | 2.48-4.22 | 3.26 | 2.50-4.25 | |
| Drinking | No | 1.0 | |||
| Yes | 0.98 | 0.82-1.16 | |||
| Smoking | Never | 1.0 | |||
| Past smoker | 0.86 | 0.62-1.21 | |||
| Current smoker | 1.16 | 0.88-1.53 | |||
| Regular Exercise | No | 1.0 | |||
| Yes | 1.25 | 1.07-1.45 | |||
| Operation or hospitalization within 1 year | No | 1.0 | |||
| Yes | 1.75 | 1.37-2.25 | |||