Subject characteristics
| School | Moisture-damaged | Control |
| Sex M/F | 8/29 | 6/17 |
| Age | 48 (34–61) | 46 (31–56) |
| Smoking# | 2 | 0 |
| Atopy | 10 | 5 |
| Number of positive skin-prick tests | ||
| Common allergens | 26 | 20 |
| Moulds | 8¶ | 1 |
M/F: male/female
#: mean wheel diameter ≥3 mm in skin-prick test (SPT) to at least one common allergen
¶: in moisture-damaged school three persons and in the control school one person had a positive SPT for moulds