Table 1.
Demographic characteristics in the matched analysis cohort of AD patients and non‐AD controls and in AD patients according to self‐rated disease severity
| Total (n = 1902) | AD (n = 634)† | Non‐AD (n = 1268) | P | Moderate/severe AD (n = 290)† | Mild AD (n = 348)† | P | |
|---|---|---|---|---|---|---|---|
| Age, years, mean (SD) | 38.51 (12.92) | 38.67 (13.07) | 38.43 (12.85) | 0.695 | 37.53 (12.81) | 39.51 (13.21) | 0.056 |
| Female, n (%) | 954 (50.16) | 332 (52.37) | 622 (49.05) | 0.173 | 148 (51.03) | 186 (53.45) | 0.543 |
| Married/living with partner, n (%) | 833 (43.80) | 277 (43.69) | 556 (43.85) | 0.948 | 108 (37.24) | 171 (49.14) | 0.003 |
| College educated, n (%) | 1040 (54.68) | 338 (53.31) | 702 (55.36) | 0.397 | 146 (50.34) | 195 (56.03) | 0.151 |
| Annual household income ≥¥8 million, ‡ n (%) | 400 (21.03) | 140 (22.08) | 260 (20.50) | 0.929 | 54 (18.62) | 90 (25.86) | 0.024 |
| Employed full time, n (%) | 864 (45.43) | 279 (44.01) | 585 (46.14) | 0.379 | 127 (43.79) | 155 (44.54) | 0.850 |
| Student, n (%) | 132 (6.94) | 52 (8.20) | 80 (6.31) | 0.126 | 31 (10.69) | 22 (6.32) | 0.047 |
| Body mass index, mean (SD) | 21.84 (3.77) | 21.81 (3.69) | 21.86 (3.81) | 0.805 | 21.79 (4.11) | 21.83 (3.33) | 0.880 |
| Alcohol use, n (%) | 1286 (67.61) | 434 (68.45) | 852 (67.19) | 0.579 | 195 (67.24) | 243 (69.83) | 0.483 |
| Current smoker, n (%) | 427 (22.45) | 135 (21.29) | 292 (23.03) | 0.381 | 57 (19.66) | 82 (23.56) | 0.016 |
| Taking regular exercise, n (%) | 777 (40.85) | 274 (43.22) | 503 (39.67) | 0.138 | 120 (41.38) | 158 (45.40) | 0.308 |
| Charlson comorbidity index, mean (SD) | 0.17 (0.60) | 0.18 (0.59) | 0.16 (0.60) | 0.499 | 0.34 (2.80) | 0.34 (1.87) | 0.970 |
†Of the 638 AD patients who met the inclusion criteria, four were not able to be matched to non‐AD controls. As of July 2017, ¥8 million was equivalent to approximately $US70 000. AD, atopic dermatitis; SD, standard deviation.