Table 2.
Main comparison on teacher-reported SDQ total difficulties score (primary outcome) using different approaches for handling missing data
| Follow-up | Intervention | Control | CC1 – primary analysis | CC2 – sensitivity analysis | MI –sensitivity analysis | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (s.d.) | Mean (s.d.) | Adjusted mean diff. (I – C) | Adjusted mean diff. (I – C) | Adjusted mean diff. (I – C) | |||||||||||
| N | Est. | 95% CI | p | ICC | N | Est. | 95% CI | p | N | Est. | 95% CI | p | |||
| 9-months | 5.5 (5.4) | 6.2 (6.2) | 2001 | −1.0 | −1.9 to −0.1 | 0.03 | 0.180 | 1467 | −0.8 | −1.6 to 0.1 | 0.09 | 2075 | −1.0 | −1.9 to −0.2 | 0.02 |
| 18-months | 6.7 (6.9) | 6.5 (6.3) | 1848 | −0.1 | −1.5 to 1.2 | 0.85 | 0.179 | 1371 | −0.2 | −1.5 to 1.1 | 0.75 | 2075 | −0.1 | −1.4 to 1.1 | 0.82 |
| 30-months | 6.1 (6.0) | 6.5 (6.6) | 1756 | −0.7 | −1.9 to 0.4 | 0.23 | 0.121 | 1318 | −0.6 | −1.8 to 0.5 | 0.30 | 2075 | −0.8 | −1.9 to 0.3 | 0.14 |
CC1 – partially-adjusted complete case analysis (primary analysis); CC2 – fully-adjusted complete case analysis; MI – fully-adjusted analysis of imputed data.
ICC – Intra-cluster (intra-school) correlation coefficient from crude (unadjusted) analysis.