Table 1. Demographic comparison of AD and non-AD groups among Korean children under 18 years old.
| Characteristics | Groups | P value | |
|---|---|---|---|
| AD group | Non-AD group | ||
| Unweighted numbers | 1,285 | 7,662 | |
| Age (year) | 9.45±0.18 | 10.47±0.09 | <0.0001 |
| Sex n (%) | 0.1000 | ||
| Male | 672 (50.32) | 4,003 (53.14) | |
| Female | 613 (49.68) | 3,659 (46.86) | |
| Body weight (kg) | 37.33±0.71 | 40.95±0.34 | <0.0001 |
| Height (cm) | 136.31±0.96 | 141.18±0.48 | <0.0001 |
| BMI (kg/m2) | 18.77±0.14 | 19.28±0.06 | 0.0005 |
| Waist circumference (cm) | 60.71±0.43 | 62.41±0.21 | 0.0003 |
| Income level, n (%) | |||
| Lowest | 107 (10.45) | 779 (12.80) | 0.0120 |
| Lower middle | 308 (25.15) | 2,084 (29.02) | |
| Higher middle | 450 (34.12) | 2,528 (31.58) | |
| Highest | 408 (30.28) | 2,166 (26.60) | |
| Place of residence, n (%) | |||
| Rural | 175 (13.40) | 1,213 (16.24) | 0.0380 |
| Urban | 1,110 (86.60) | 6,449 (83.76) | |
Means±SE or percentages are weighted. P values for continuous variables are from t test, and for categorical variables from Rao-Scott chi-square test. AD, atopic dermatitis; BMI, body mass index; SE, standard error.