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Characteristics of schools (n = 8) and classrooms (n = 61)
| School | Classroom | |
|---|---|---|
| n (%) | n (%) | |
| Year of construction | ||
| After1995 | 3 (37.5) | 24 (39.3) |
| Before 1987 | 5 (62.5) | 37 (60.7) |
| Ventilation system | ||
| Natural | 4 (50) | 29 (47.5) |
| Mechanical | 4 (50) | 32 (52.5) |
| Moldy odor | 3 (37.5) | 9 (14.8) |
| Visible mold | 2 (25) | 9 (14.8) |
| Water leakage | 3 (37.5) | 7 (11.5) |
| Condensation on windowpanes | 3 (37.5) | 22 (36.1) |
| Number of pupils per class | ||
| ≤20 | 8 (14.8) | |
| 21–30 | 23 (37.7) | |
| ≥31 | 29 (47.5) | |
