Table 3. Factors associated with atopic dermatitis using ordinal logistic regression (multivariable analysis).
| Variables | Boys | Girls | Total | ||||||
| OR | 95% CI | P-value | OR | 95% CI | P-value | OR | 95% CI | P-value | |
| Age (years) | |||||||||
| 12 | 1.33 | 1.13–1.56 | <.0001 | 1.25 | 1.08–1.46 | <.0001 | 1.30 | 1.17–1.45 | <.0001 |
| 13 | 1.24 | 1.09–1.40 | <.0001 | 1.41 | 1.26–1.58 | <.0001 | 1.33 | 1.22–1.44 | <.0001 |
| 14 | 1.15 | 1.02–1.30 | 0.02 | 1.32 | 1.18–1.48 | <.0001 | 1.24 | 1.14–1.35 | <.0001 |
| 15 | 1.16 | 1.03–1.31 | 0.02 | 1.22 | 1.09–1.37 | <.0001 | 1.19 | 1.10–1.29 | <.0001 |
| 16 | 1.12 | 1.00–1.26 | 0.06 | 1.12 | 1.00–1.25 | 0.05 | 1.13 | 1.04–1.22 | <.0001 |
| 17 | 1.12 | 1.00–1.27 | 0.06 | 1.08 | 0.97–1.21 | 0.17 | 1.10 | 1.02–1.20 | 0.02 |
| 18 | 1.00 | 1.00 | 1.00 | ||||||
| Current smoking | |||||||||
| Nonsmoking | 1.00 | 1.00 | 1.00 | ||||||
| Smoking | 0.93 | 0.85–1.01 | 0.10 | 1.02 | 0.90–1.15 | 0.76 | 0.89 | 0.83–0.95 | <.0001 |
| Current alcohol consumption | |||||||||
| Nondrinking | 1.00 | 1.00 | 1.00 | ||||||
| Drinking | 1.02 | 0.94–1.10 | 0.68 | 0.98 | 0.91–1.06 | 0.68 | 1.00 | 0.94–1.05 | 0.88 |
| Educational level of mother | |||||||||
| Middle school or lower | 1.00 | 1.00 | 1.00 | ||||||
| High school | 1.05 | 0.91–1.20 | 0.52 | 1.28 | 1.12–1.46 | <.0001 | 1.16 | 1.06–1.28 | <.0001 |
| College or higher | 1.07 | 0.92–1.25 | 0.36 | 1.41 | 1.22–1.63 | <.0001 | 1.23 | 1.11–1.36 | <.0001 |
| Educational level of father | |||||||||
| Middle school or lower | 1.00 | 1.00 | 1.00 | ||||||
| High school | 1.10 | 0.96–1.26 | 0.19 | 1.15 | 1.01–1.32 | 0.04 | 1.14 | 1.03–1.25 | 0.01 |
| College or higher | 1.34 | 1.15–1.54 | <.0001 | 1.22 | 1.06–1.41 | <.0001 | 1.29 | 1.16–1.42 | <.0001 |
| Economic status | |||||||||
| Very wealthy | 0.86 | 0.72–1.02 | 0.08 | 0.86 | 0.71–1.03 | 0.10 | 0.83 | 0.73–0.94 | <.0001 |
| Wealthy | 0.98 | 0.84–1.14 | 0.75 | 0.94 | 0.81–1.09 | 0.44 | 0.96 | 0.86–1.07 | 0.44 |
| Average | 0.92 | 0.80–1.06 | 0.26 | 0.87 | 0.76–1.00 | 0.05 | 0.91 | 0.82–1.01 | 0.06 |
| Poor | 0.96 | 0.82–1.12 | 0.60 | 0.91 | 0.79–1.06 | 0.23 | 0.95 | 0.85–1.06 | 0.33 |
| Very poor | 1.00 | 1.00 | 1.00 | ||||||
| Living situation | |||||||||
| Living with family | 0.84 | 0.50–1.41 | 0.50 | 1.35 | 0.60–3.06 | 0.47 | 1.01 | 0.65–1.57 | 0.96 |
| Living with relatives | 0.94 | 0.53–1.69 | 0.84 | 1.56 | 0.66–3.67 | 0.31 | 1.15 | 0.72–1.85 | 0.55 |
| Boarding house, living alone, dormitory | 0.79 | 0.46–1.37 | 0.40 | 1.37 | 0.60–3.14 | 0.46 | 0.98 | 0.63–1.55 | 0.95 |
| Facilities* | 1.00 | 1.00 | 1.00 | ||||||
| City type | |||||||||
| Large city | 1.15 | 1.05–1.27 | <.0001 | 0.97 | 0.88–1.06 | 0.44 | 1.05 | 0.98–1.12 | 0.18 |
| Mid-sized city | 1.12 | 1.02–1.24 | 0.02 | 1.02 | 0.93–1.11 | 0.68 | 1.07 | 1.00–1.14 | 0.04 |
| Small city | 1.00 | 1.00 | 1.00 | ||||||
| Stress | |||||||||
| Very high | 1.46 | 1.20–1.78 | <.0001 | 1.24 | 0.94–1.62 | 0.12 | 1.53 | 1.31–1.78 | <.0001 |
| High | 1.44 | 1.19–1.73 | <.0001 | 1.22 | 0.94–1.59 | 0.14 | 1.48 | 1.27–1.72 | <.0001 |
| Moderate | 1.21 | 1.00–1.45 | 0.05 | 1.09 | 0.84–1.41 | 0.54 | 1.24 | 1.07–1.45 | <.0001 |
| Low | 1.10 | 0.91–1.33 | 0.34 | 0.93 | 0.71–1.22 | 0.59 | 1.08 | 0.92–1.26 | 0.36 |
| None | 1.00 | 1.00 | 1.00 | ||||||
*
Facilities: an organization for social welfare and an orphanage.