Table 1 School characteristics
From: A ventilation intervention study in classrooms to improve indoor air quality: the FRESH study
School | n students | Study region | Condition | Study period |
|---|---|---|---|---|
E1 | 31 | Zwolle | Intervention 1 (800–1200) | Jan 2011 |
E2 | 27 | Zwolle | Intervention 1 (800–1200) | March 2011 |
E3 | 22 | Zwolle | Intervention 1 (800–1200) | Nov 2011 |
E4 | 30 | Groningen | Intervention 1 (800–1200) | Jan 2011 |
E5 | 27 | Groningen | Intervention 1 (800–1200) | Jan 2012 |
E6 | 25 | Groningen | Intervention 1 (800–1200) | March 2012 |
E7 | 23 | Zwolle | Intervention 2 (1200–800) | Feb 2012 |
E8 | 23 | Zwolle | Intervention 2 (1200–800) | March 2012 |
E9 | 22 | Zwolle | Intervention 2 (1200–800) | Jan 2012 |
E10 | 23 | Groningen | Intervention 2 (1200–800) | Nov 2010 |
E11 | 29 | Groningen | Intervention 2 (1200–800) | March 2011 |
E12 | 29 | Groningen | Intervention 2 (1200–800) | Nov 2011 |
C1 | 36 | Zwolle | Control | Oct 2010 |
C2 | 25 | Zwolle | Control | Jan 2011 |
C3 | 22 | Zwolle | Control | March 2011 |
C4 | 28 | Groningen | Control | Jan 2011 |
C5 | 18 | Groningen | Control | March 2011 |
C6 | 29 | Groningen | Control | March 2012 |