Table 2. Baseline characteristics according to atopic dermatitis in Korean adults after matching for age and sex.
| Variable | Normal (n=1,208) | AD (n=302) | p-value |
|---|---|---|---|
| Age (yr) | 0.993 | ||
| 19~29 | 461 (54.52) | 116 (55.85) | |
| 30~39 | 227 (16.63) | 56 (15.8) | |
| 40~49 | 129 (10.83) | 32 (10.6) | |
| 50~59 | 165 (10.14) | 41 (10.83) | |
| 60~69 | 128 (4.71) | 34 (4.41) | |
| ≥70 | 98 (3.17) | 23 (2.52) | |
| Sex | 0.522 | ||
| Male | 448 (49.35) | 114 (51.85) | |
| Female | 760 (50.65) | 188 (48.15) | |
| House income | 0.759 | ||
| Quartile 1 | 138 (11.52) | 32 (10.81) | |
| Quartile 2 | 324 (27.13) | 78 (26.71) | |
| Quartile 3 | 383 (31.85) | 97 (32.47) | |
| Quartile 4 | 353 (29.32) | 89 (30.02) | |
| Education level | 0.529 | ||
| ≤Elementary school | 121 (6.34) | 24 (5.10) | |
| Middle school graduate | 117 (6.12) | 23 (4.95) | |
| High school graduate | 572 (52.53) | 152 (54.78) | |
| ≥College graduate | 362 (33.25) | 98 (35.18) | |
| Occupation | 0.006* | ||
| White collar | 451 (40.15) | 119 (43.26) | |
| Blue collar | 301 (23.76) | 45 (13.2) | |
| Unemployed | 455 (36.08) | 137 (43.54) | |
| Region | <0.001* | ||
| Rural | 819 (54.42) | 75 (23.79) | |
| Urban | 389 (45.58) | 227 (76.21) | |
| Smoking status | 0.167 | ||
| Nonsmoker | 805 (60.1) | 185 (57.34) | |
| Ex-smoker | 171 (13.61) | 60 (19.09) | |
| Smoker | 229 (26.29) | 57 (23.58) | |
| Alcohol-drinking | 0.908 | ||
| None | 285 (16.66) | 72 (18.01) | |
| Occasional (<2/wk) | 720 (63.73) | 179 (62.78) | |
| Frequent (≥2/wk) | 199 (19.6) | 48 (19.21) | |
| Overweight (BMI ≥25 kg/m2) | 354 (28.94) | 84 (29.46) | 0.891 |
| Diagnosis of HTN | 170 (8.89) | 42 (6.35) | 0.143 |
| Diagnosis of DM | 61 (3.09) | 15 (2.21) | 0.344 |
| Diagnosis of hypercholesterolemia | 75 (3.53) | 29 (5.12) | 0.247 |
| Family history of ocular disease | 281 (22.04) | 70 (20.75) | 0.674 |
Data are presented as numbers (weighted percentage). Numbers may not sum to 1,510 because of missing values in the database. AD: atopic dermatitis, BMI: body mass index, HTN: hypertension, DM: diabetes mellitus. p-values were calculated using the Rao–Scott chi-square test, and those in asterisks (*) are statistically significant.