Number of questionnaires returned, total costs, and costs per respondent
| Participants | Questionnaires returned | Total costs (AUD) | Costs per respondent (AUD) | |||
|---|---|---|---|---|---|---|
| Sample A | Sample B | Sample A | Sample B | |||
| *At this stage there were also 19 other responses, including refusals and wrong addresses; †at this stage there were also 18 other responses, including refusals, wrong addresses and deceased; ‡average cost; §marginal cost. | ||||||
| 1 Those who responded before randomisation | 200 | 92 | 96* | 16† | 1560 | 14‡ |
| 2 Those telephoned | 43 | 29 | 20 | 11 | 851 | 27§ |
| 3 Those not telephoned | 42 | 29 | 9 | 3 | 386 | 32§ |