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| Variable | Comparison group (n=169) | Telephone call - educational group (n=171) | Telephone call - reminder group (n=170) | Total (N=510) | ||||
| f | % | f | % | f | % | f | % | |
| Returned | 113 | 66.9 | 157 | 91.8 | 159 | 93.5 | 429 | 84.1 |
| Did not return | 56 | 33.1 | 14 | 8.2 | 11 | 6.5 | 81 | 15.9 |
