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Numbers of questionnaires returned, by arm of trial
| Online first (n = 4,398) | Choice (n = 4,397) | Odds ratio (95% CI) | P-value | Adjusted odds ratioa (95% CI) | P-value | |
|---|---|---|---|---|---|---|
| Total number (%) of questionnaires returned | 2,078 (47%) | 2,144 (49%) | 0.94 (0.87, 1.02) | 0.16 | 0.90 (0.82, 0.99) | 0.04 |
Abbreviations: CI, confidence interval; IMD, Index of Multiple Deprivation.
Adjusted for gender, previous participation score (continuous), and IMD tertile.
