Table 1 Summary of CATI and diary characteristics and data handling prior to statistical analysis
From: Collecting household water usage data: telephone questionnaire or diary?
| Characteristic | CATI | Diary |
|---|---|---|
| Database design A$ | $5000 | $2360 |
| Duration | 15-20 min* | Not applicable |
| Target number | 500 | 200 |
| Order of administration | First | Second (always Post CATI) |
| Recruitment strategy | Electoral records and introductory letter | $40 incentive (voucher) |
| Time period under investigation | Immediate past week (in detail) and up to one year prior | 7-day period only |
| Data entry onto ACCESS database | Immediate (as telephone interview was conducted) | Manual entry |
| Actions prior to interview/diary administration excluding initial mail-out and associated activities | - Questionnaire design | - Print diary cards |
| - ACCESS database design | - Design and print diary instructions | |
| - Compile diary cards; pack and send* | ||
| - Follow-up phone call to check diary pack receipt* | ||
| - ACCESS database design | ||
| Actions subsequent to interview/diary completion | - Check data entry immediately following interview* | - Check diary cards for completion/legibility* |
| - Tally number of uses recorded on cards* | ||
| - Transfer data including tallies from diary card to ACCESS database* | ||
| - Check 10-25% data transferral to database* | ||
| Estimated number of hours labour per completed CATI/diary (for * activities) | 30 min | 1 hr 25 min |
