Table 2.
Recruitment and enrollment funnel results during each modification strategy. N/A: not applicable.
| Key funnel indicators | Original strategy | Modification 1 | Modification 2 | Modification 3 |
| Time frame | Weeks 1-4 | Weeks 5-6 | Weeks 7-15 | Weeks 16-26 |
| Number of downloads | 27,364 | 19,801 | 28,478 | 54,018 |
| Estimated women preventing pregnancy with Dota | 9030 | 6534 | 9398 | 17,826 |
| Received recruitment message | 690 | 1907 | 5089 | 6451 |
| Indicated interest in the study, n (%) | 176 (25.5) | 460 (24.12) | 1067 (20.97) | 1311 (20.32) |
| Completed pre-eligibility screening questions, n (%) | 166 (94.3) | 448 (97.4) | 1038 (97.28) | 1280 (97.64) |
| Eligible for the study and given enrollment options, n (%) | 103 (62.1) | 267 (59.6) | 674 (64.93) | 715 (55.86) |
| Scheduled call confirmation screen, n (%) | 62 (60.2) | 149 (55.8) | 29 (9.8) | 8 (1.1) |
| Called immediately, n (%) | 4 (4) | 14 (5.2) | 4 (0.5) | 25 (3.5) |
| Enrolled total | 22 | 60 | 143 | 494 |
| Conversion rate (%)b | 21.4 | 22.5 | 21.2 | 69.1 |
| Enrolled via chat, n (%) | N/A | N/A | 53 (37.4) | 90 (18.2) |
| Enrolled via self-enroll, n (%) | N/A | N/A | N/A | 366 (74.1) |
aInformation on the proportion of users using Dot to prevent pregnancy obtained from Cycle Technology suggests that 33% of Dot users are preventing pregnancy.
bConversion rate calculated by dividing the number of enrolled women by the number of women identified as eligible for the study and given enrollment options.