Table 4 Mean indoor relative humidity (%) per school per week
From: A ventilation intervention study in classrooms to improve indoor air quality: the FRESH study
Week 1 | Week 2 | Week 3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
School | Condition | n | mean | sd | n | mean | sd | n | mean | sd |
E1 | Intervention 1 (800–1200) | 344 | 33.6 | 6.4 | 344 | 38.0 | 11.7 | 280 | 30.3 | 4.0 |
E2 | 352 | 30.4 | 6.2 | 345 | 28.3 | 10.4 | 294 | 44.9 | 6.8 | |
E3 | 286 | 54.4 | 5.6 | 285 | 41.5 | 7.6 | 320 | 32.0 | 8.6 | |
E4 | 215 | 45.5 | 7.8 | 312 | 35.3 | 6.8 | 350 | 37.3 | 4.2 | |
E5 | 347 | 49.8 | 6.2 | 295 | 30.7 | 4.0 | 257 | 32.7 | 3.2 | |
E6 | 255 | 48.2 | 3.4 | 270 | 40.2 | 3.4 | 297 | 42.1 | 4.4 | |
E7 | Intervention 2 (1200–800) | 356 | 40.1 | 5.6 | 356 | 27.9 | 4.6 | 356 | 29.2 | 3.0 |
E8 | 354 | 42.7 | 3.9 | 321 | 42.4 | 3.7 | 353 | 40.4 | 3.0 | |
E9 | 265 | 27.1 | 4.4 | 301 | 15.7 | 3.0 | 336 | 30.2 | 2.9 | |
E10 | 222 | 48.7 | 4.0 | 272 | 31.4 | 2.9 | 334 | 32.6 | 1.6 | |
E11 | 367 | 46.6 | 7.9 | 352 | 31.4 | 7.3 | 336 | 39.9 | 7.5 | |
E12 | 347 | 53.8 | 4.7 | 343 | 41.9 | 4.8 | 309 | 33.0 | 5.9 | |
C1 | Control | 380 | 62.3 | 2.9 | 379 | 54.6 | 4.5 | 379 | 55.0 | 2.2 |
C2 | 342 | 33.4 | 6.5 | 342 | 32.7 | 6.3 | 342 | 37.3 | 4.2 | |
C3 | 351 | 42.3 | 4.3 | 335 | 43.7 | 6.5 | 327 | 47.0 | 6.3 | |
C4 | 350 | 37.1 | 4.4 | 340 | 39.6 | 7.6 | 340 | 36.0 | 5.7 | |
C5 | 353 | 35.9 | 4.1 | 328 | 35.8 | 6.9 | 312 | 40.1 | 5.3 | |
C6 | 282 | 27.6 | 4.2 | 344 | 29.4 | 4.2 | 336 | 42.8 | 4.0 | |