Table 3 School building characteristics and prevalence of SBS symptoms (N = 12)
Schools | Number of students | Building age (year) | Construction | Floor material | Ventilation type | Window panes | Heating energy | Humidity control | Mucosal symptoms | Skin symptoms | General symptoms |
|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 633 | 1 | Ferroconcrete | Wood | Mechanical, exhaust | Paired glass | Natural gas | No | 35 (6.7) | 11 (2.1) | 1 (0.2) |
2 | 296 | 30 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Kerosene | No | 11 (5.5) | 4 (2.0) | 1 (0.5) |
3 | 906 | 35 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Natural gas | No | 51 (8.7) | 7 (1.2) | 2 (0.3) |
4 | 329 | 36 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Kerosene | No | 17 (8.8) | 2 (1.0) | 2 (1.0)) |
5 | 494 | 46 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Natural gas | No | 19 (7.6) | 8 (3.2) | 5 (2.0) |
6 | 529 | 27 | Ferroconcrete | PVC tiles | Mechanical, exhaust | Single-glass, double-paned | Kerosene | Yes | 29 (7.7) | 7 (1.8) | 4 (1.1) |
7 | 552 | 26 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Natural gas | No | 23 (5.4) | 9 (2.1) | 7 (1.6) |
8 | 113 | 30 | Ferroconcrete | Wood | Mechanical, exhaust | Single-glass, double-paned | Electricity | No | 3 (3.1) | 0 (0.0) | 0 (0.0) |
9 | 677 | 18 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Natural gas | No | 36 (7.2) | 9 (1.8) | 5 (1.0) |
10 | 645 | 24 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Electricity | No | 34 (7.3) | 13 (2.7) | 3 (0.6) |
11 | 742 | < 1 | Prefabricate | Wood | Natural | Paired glass | Natural gas | No | 11 (3.6) | 10 (2.0) | 4 (0.8) |
12 | 477 | 14 | Ferroconcrete | PVC tiles | Natural | Single-glass, double-paned | Natural gas | No | 11 (6.9) | 7 (2.3) | 1 (0.3) |