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 | 20.2 | 1.4 | 344 | 20.3 | 0.9 | 280 | 20.3 | 0.9 |
E2 | 352 | 21.1 | 1.1 | 345 | 19.1 | 0.8 | 294 | 19.1 | 0.8 | |
E3 | 286 | 21.0 | 0.9 | 285 | 19.3 | 1.7 | 320 | 19.3 | 1.7 | |
E4 | 215 | 19.2 | 1.1 | 312 | 18.5 | 1.2 | 350 | 18.5 | 1.2 | |
E5 | 347 | 21.2 | 1.1 | 295 | 21.4 | 1.5 | 257 | 21.4 | 1.5 | |
E6 | 255 | 20.4 | 1.0 | 270 | 20.2 | 0.5 | 297 | 20.2 | 0.5 | |
E7 | Intervention 2 (1200–800) | 356 | 21.6 | 0.9 | 356 | 20.4 | 1.0 | 356 | 20.4 | 1.0 |
E8 | 354 | 19.2 | 0.8 | 321 | 19.7 | 1.2 | 353 | 19.7 | 1.2 | |
E9 | 265 | 21.8 | 1.5 | 301 | 20.8 | 1.9 | 336 | 20.8 | 1.9 | |
E10 | 222 | 23.0 | 0.8 | 272 | 23.3 | 0.9 | 334 | 23.3 | 0.9 | |
E11 | 367 | 20.9 | 1.1 | 352 | 20.8 | 1.3 | 336 | 20.8 | 1.3 | |
E12 | 347 | 22.0 | 1.3 | 343 | 21.1 | 0.8 | 309 | 21.1 | 0.8 | |
C1 | Control | 380 | 22.6 | 1.2 | 379 | 20.6 | 1.5 | 379 | 20.6 | 1.5 |
C2 | 342 | 21.2 | 0.8 | 342 | 20.7 | 0.6 | 342 | 20.7 | 0.6 | |
C3 | 351 | 19.8 | 1.3 | 335 | 20.1 | 1.6 | 327 | 20.1 | 1.6 | |
C4 | 350 | 20.9 | 0.6 | 340 | 21.8 | 0.8 | 340 | 21.8 | 0.8 | |
C5 | 353 | 20.4 | 1.2 | 328 | 22.3 | 0.6 | 312 | 22.3 | 0.6 | |
C6 | 282 | 19.7 | 1.0 | 344 | 20.1 | 1.0 | 336 | 20.1 | 1.0 |