Preferred outreach methods, frequency of data access and perceived usefulness of adherence information from DPS
| Preferred outreach method after DPS-detected non-adherence* | N (%) |
| Automated text message | 125 (79.6) |
| Notification within DPS app | 101 (64.3) |
| Automated phone call reminder | 17 (10.8) |
| Phone call from study team | 22 (14.0) |
| Brief text message interactions (<5 min) around PrEP adherence strategies | 27 (17.2) |
| Text messages with educational information about sexual health and PrEP | 20 (12.7) |
| Other | 3 (1.9) |
| No outreach | 7 (4.5) |
| Preferred frequency for accessing PrEP adherence data | N (%) |
| Daily or on-demand | 66 (42.0) |
| Once a week | 52 (33.1) |
| Once a month | 16 (10.2) |
| Only if I miss a dose | 18 (11.5) |
| No desire to access adherence data | 5 (3.2) |
| Perceived usefulness of types of adherence information | Mean (SD) | Minimally N (%) | Moderately N (%) | Extremely N (%) |
| Visual record of all PrEP doses taken (eg, via in-app calendar)† | 3.65 (3.3) | 29 (18.5) | 31 (19.7) | 96 (61.1) |
| Weekly message reporting number of PrEP doses taken (eg, ‘You took 5 of 7 PrEP pills this week’) | 3.61 (3.3) | 32 (20.4) | 31 (19.7) | 93 (59.2) |
| Weekly message reporting percentage of PrEP doses taken (eg, ‘You took 75% of your PrEP pills this week’) | 3.24 (3.0) | 52 (33.1) | 29 (18.5) | 76 (48.4) |
Note: Reported means are mean Likert scores.
*For this question, participants were instructed to select all responses that applied.
†N=156 (data unavailable for one participant).
DPS, digital pill systems; PrEP, pre-exposure prophylaxis.