Table 1 Number of voucher requests per email address during the initial recruitment period
From: The detection and management of attempted fraud during an online randomised trial
Number of voucher requests per email address | N (%) |
|---|---|
1 | 514 (95.5%) |
2 | 17 (3.2%) |
3 | 2 (0.4%) |
4 | 1 (0.2%) |
5 | 1 (0.2%) |
22 | 1 (0.2%) |
77 | 1 (0.2%) |
169 | 1 (0.2%) |
Total | 538 (100%) |