Table 2.
Demographic characteristics by categories of self-reported stress.
| Characteristics | Stress | p-Value a | |||
|---|---|---|---|---|---|
| Low (n = 5527) | Medium (n = 18,472) | High (n = 7442) | Very High (n = 1577) | ||
| AD, n (%) | 61 (1.10) | 312 (1.69) | 188 (2.53) | 46 (2.92) | <0.001 |
| Gender, % female | 53.4 | 56.6 | 62.2 | 63.3 | <0.001 |
| Mean age, year (95% CI) | 59.5 (59.1, 59.9) | 48.8 (48.6, 49.0) | 47.2 (46.8, 47.6) | 49.3 (48.5, 50.1) | <0.001 |
| BMI, kg/m2 (95% CI) | 23.9 (23.8, 24.0) | 23.6 (23.6, 23.6) | 23.7 (23.6, 23.7) | 23.9 (23.7, 24.1) | 0.753 |
| Education > high school, % | 21.6 | 35.7 | 38.7 | 31.1 | <0.001 |
| Income, US$/month (95% CI) | 2502 (2302, 2702) | 3247 (3132, 3362) | 3104 (2918, 3291) | 2805 (2519, 3091) | 0.315 |
| Cigarette smoking, % | 30.3 | 29.8 | 32.8 | 35.0 | <0.001 |
| Alcohol drinking, % | 43.8 | 53.8 | 54.5 | 50.5 | <0.001 |
Abbreviations: AD, atopic dermatitis; CI, confidence interval; BMI, body mass index. a p-Values were calculated using a Mantel-Haenzel chi-square test for categorical variables or by a linear trend test for continuous variables.