Table 1.
Overview of feasibility and effectiveness of recruiting through text
| Feasibility | Effectiveness | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | Message type | messages sent | Cancelleda | % Cancelled (95% CI)b | Interested | % Interested (95% CI)c | Enrolled | % Enrolled (95% CI)d | % of smokers enrolled (estimate)e |
| October 6, 2015 | Free | 886 | 22 | 2.48% (1.56–3.74%) | 74 | 8.35% (6.61–10.37%) | 14 | 1.58% (0.87–2.64%) | 15.49% |
| October 20, 2015 | Empathy | 974 | 12 | 1.23% (0.64–2.14%) | 121 | 12.42% (10.42–14.66%) | 24 | 2.46% (1.59–3.64%) | 24.16% |
| October 27, 2015 | Empathy | 847 | 9 | 1.06% (0.49–2.01% | 93 | 10.98% (8.95–13.28%) | 17 | 2.01% (1.17–3.19%) | 19.68% |
| November 3, 2015 | Pride | 888 | – | – | 109 | 12.27% (10.19–14.62%) | 21 | 2.36% (1.47–3.59%) | 23.18% |
| November 10, 2015 | Free | 836 | 25 | 2.99% (1.94–4.38%) | 80 | 9.57% (7.66–11.77%) | 16 | 1.91% (1.10–3.09%) | 18.76% |
| November 17, 2015 | Empathy | 1147 | 18 | 1.57% (0.93–2.47%) | 109 | 9.5% (7.87–11.35%) | 15 | 1.31% (0.73–2.15%) | 12.82% |
| December 8, 2015 | Empathy | 1118 | – | – | 101 | 9.03% (7.42–10.87%) | 25 | 2.24% (1.45–3.28%) | 21.92% |
| January 12, 2016 | Pride | 871 | 11 | 1.26% (0.63–2.25%) | 91 | 10.45% (8.50–12.67%) | 18 | 2.07% (1.23–3.25%) | 20.26% |
| January 19, 2016 | Free | 858 | 13 | 1.52% (0.81–2.58%) | 77 | 8.97% (7.15–11.09%) | 16 | 1.86% (1.07–3.01%) | 18.28% |
| January 26, 2016 | Empathy | 785 | – | – | 81 | 10.32% (8.28–12.66%) | 16 | 2.04% (1.17–3.29%) | 19.98% |
| February 2, 2016 | Pride | 984 | 22 | 2.24% (1.41–3.37%) | 102 | 10.37% (8.53–12.44%) | 17 | 1.73% (1.01–2.75%) | 16.94% |
| Total | 10,194 | 132 | 1.78% (1.08–1.53%) | 1038 | 10.18% (9.60–10.79%) | 199 | 1.95% (1.69–2.24%) | 19.14% | |
aDays when Text4baby subscribers were sent another ad hoc or topical module message were excluded
bThe number of “STOP” text responses among the number of recruitment messages sent
cThe number of “YES” text responses among the number of recruitment messages sent
dThe number enrolled in the trial among the number of recruitment messages sent
eThe number enrolled in the trial among an estimated 10.2% of smokers who were sent a recruitment message