Table 1 Baseline demographics and response rates
From: Internet trials: participant experiences and perspectives
Whole sample (n=1246) | Survey responders (n=416) | Survey non-responders (n=830) | Comparison between responders and non-responders | |
|---|---|---|---|---|
Age | ||||
mean (SD) | 42.9 (13.1) | 46.3 (13.1) | 41.2 (12.8) | t1244=−6.59, p<0.0001 |
range | 21-88 | 23-78 | 21-88 | |
median | 42 | 45.5 | 39 | |
Gender | ||||
male n (%)* | 514 (41.3) | 166 (39.9) | 348 (41.9) | X 1 2 =0.468, p=0.49 |