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Comparison of groups at follow-up (total n=931 without University of Gävle).
| Number of follow-up emails before response, n (%) | Intervention (n=402) | Control (n=529) | P-value |
| 1 | 222 (55.2) | 315 (59.6) | .07 a |
| 2 | 82 (20.4) | 103 (19.5) |
|
| 3 | 51 (12.7) | 70 (13.2) |
|
| 4 | 27 (6.7) | 23 (4.3) |
|
| 5 | 20 (5.0) | 18 (3.4) |
|
aTrend test.
