Table 6 ANCOVA analysis of comparing the VAS of two groups in 2 h by adjusted pethidine consumption
Sources of effect | SS | df | σ2 | F | p-value |
|---|---|---|---|---|---|
Modified model | 46.339 | 3 | 15.446 | 13.997 | 0.0001 |
Constant | 84.395 | 1 | 84.395 | 76.476 | 0.0001 |
Group | 10.31 | 1 | 10.31 | 9.343 | 0.003 |
Pain score pre-injection | 31.263 | 1 | 31.263 | 28.33 | 0.0001 |
Interaction of group-pain score pre-injection | 0.732 | 1 | 0.732 | 0.663 | 0.419 |
Error | 59.592 | 54 | 1.104 | ||
Total | 160 | 58 | |||
Total modified | 105.931 | 57 |