Table IV.
Comparison of contact allergy frequencies between conscripts investigated for foot dermatitis and a control group of consecutively tested dermatitis patients aged 20-21 years
| Test substances | Conc. | Conscripts | Controls | OR (95% CI) | ||
|---|---|---|---|---|---|---|
| Total na | Positive test n (%) | Total n | Positive test n (%) | |||
| Nickel(ii)sulphate hexahydrate | 5% pet | 26 | 1 (3.8) | 225 | 31 (14) | 0.3 (0.04–2.7) |
| Colophonium | 20% pet | 26 | 13 (50) | 228 | 1 (0.4) | 220 (25–1,903) |
| 4-tert-Butylphenolformaldehyde resin | 1% pet | 26 | 1 (3.8) | 227 | 1 (0.5) | 19 (1.1–335) |
| Phenol formaldehyde resin 2 (PFR2) | 1% pet | 26 | 3 (12) | 227 | 2 (0.9) | 9.7 (1.4–66) |
| Formaldehyde | 2% aq | 26 | 1 (3.8) | 227 | 7 (3.1) | 1.5 (0.2–14) |
| Peru balsam | 25% pet | 26 | 1 (3.8) | 226 | 5 (2.2) | 1.2 (0.1–11) |
| Fragrance mix I | 14% pet | 26 | 2 (7.7) | 227 | 7 (3.1) | 2.9 (0.5–21) |
| Fragrance mix II | 8% pet | 26 | 2 (7.7) | 227 | 3 (1.3) | 3.9 (0.6–26) |
| Hydroperoxides of linalool | 1% pet | 26 | 6 (23) | 208 | 9 (4.3) | 5.8 (1.8–19) |
| Hydroperoxides of limonene | 0.3% pet | 26 | 9 (35) | 209 | 10 (4.8) | 13 (4.3–42) |
The conscripts were patch tested in 2022. The control group consisted of consecutively tested dermatitis patients aged 20–21 years investigated in the preceding 10 years (2012 to 2021). The data are based on the results of patch test reading on day 3 or 4.
a
total number included in the regression analyses.
OR: odds ratio; CI: confidence interval; Conc.: concentration and vehicle; aq: aqua; pet: petrolatum. Bold figures indicate statistically significant results (95% CI > 1 or < 1).