n | 1stGrade | 2ndGrade | 3rdGrade | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
September 2006 | April 2007 | September 2007 | April 2008 | September 2008 | |||||||
OR | CI | OR | CI | OR | CI | OR | CI | OR | CI | ||
Group | |||||||||||
Control | 88 | Ref | Ref | Ref | Ref | Ref | |||||
Intervention | 88 | 1.17 | 0.57-2.40 | 0.64 | 0.31-1.32 | 0.34* | 0.16-0.72 | 0.13‡ | 0.05-0.34 | 0.09‡ | 0.04-0.27 |
Gender | |||||||||||
Girls | 84 | Ref | Ref | Ref | Ref | Ref | |||||
Boys | 92 | 2.64* | 1.24-5.62 | 2.38* | 1.13-5.01 | 1.99 | 0.94-4.20 | 2.02 | 0.91-4.49 | 1.85 | 0.83-4.12 |
R 2 | 0.05 | 0.06 | 0.10 | 0.21 | 0.25 |