| Control group expected quit rate as %ge | Respiragenegroup expected quit rate as %ge | χ2calculated from four-some table | P value based on χ2 | Power calculations* | |
---|---|---|---|---|---|---|
8Â weeks | Sample size 30/30* | 70% | 94% | 5.9 | <0.05 | 79.3% |
Sample size 60/60* | 11.7 | <0.01 | 96.9% | |||
6Â months | Sample size 30/30** | 35% | 52% | 1.7 | NS | 36.5% |
Sample size 60/60** | 6.2 | <0.05 | 87.1% |