Table 2 Results of logistic regression analysis of responses in the various incentive groups compared to the controls after 6 weeks and of the effects of sex and age.
From: Scratch lottery tickets are a poor incentive to respond to mailed questionnaires
| Â | Odds ratio | 95% conf. int. | P-value |
|---|---|---|---|
Controls (reference group) | 1 | Â | Â |
1 ticket | 0.881 | 0.620–1.250 | 0.5 |
2 tickets | 1.209 | 0.836–1.748 | 0.3 |
2 tickets later | 0.920 | 0.647–1.309 | 0.6 |
50 NOK | 2.489 | 1.612–3.841 | 0.0001 |
Female sex | 1.547 | 1.204–1.987 | 0.001 |
Age (per year) | 1.028 | 1.010–1.046 | 0.002 |