Table 4. Percent changes of atopic dermatitis symptoms caused by formaldehyde exposure.
| Classification | Subgroup | % change (95% CI)* |
|---|---|---|
| All | 2.50 (−4.00, 9.45) | |
| Season | Spring | 79.18 (19.62, 168.37)† |
| Summer | 39.91 (14.33, 71.20)† | |
| Fall | −12.21 (−25.14, 2.96) | |
| Winter | −8.34 (−21.34, 6.79) | |
| Gender | Boys | 4.43 (−3.64, 13.18) |
| Girls | 1.44 (−9.84, 14.14) | |
| Age (yr) | < 6.0 | −1.37 (−8.01, 5.75) |
| ≥ 6.0 | 27.97 (6.58, 53.66)† | |
| BMI (kg/m2) | < 16.8 | 3.41 (−5.24, 12.84) |
| > 16.8 | 4.28 (−6.13, 15.85) | |
| Presence of parental allergic diseases | (−) | 0.13 (−8.69, 9.80) |
| (+) | 4.92 (−4.77, 15.59) | |
| Passive smoking | (−) | 1.56 (−9.03, 13.38) |
| (+) | 2.47 (−6.32, 12.08) | |
| Indoor mold/dampness | (−) | 1.63 (−4.85, 8.56) |
| (+) | 29.84 (−1.03, 70.34) | |
| Indoor temperature (°C) | < 25.5 | −2.57 (−10.72, 6.33) |
| > 25.5 | 17.8 (3.9, 33.55)† | |
| Indoor RH (%) | < 40 | −2.60 (−21.03, 20.14) |
| 40–60 | −0.97 (−9.51, 8.39) | |
| > 60 | 14.17 (−0.87, 31.49) | |
CI, confidence interval; BMI, body mass index; RH, relative humidity.
*Percentage of change in AD symptoms per 10 ppb of formaldehyde exposure; †Statistically significant with 95% CI.