Table 2.
Group comparison on compliance, use patterns, and user experiences (N=307).
| 1.IVR Daily (N=81) |
2.IVR Weekly (N=76) |
3.SMS Daily (N=81) |
4.SMS Weekly (N=69) |
Group difference b | |
|---|---|---|---|---|---|
| Compliance | |||||
| Rate a | 50.21 (30.70) | 71.46 (30.84) | 57.12 (28.81) | 64.95 (30.61) | 1–2, 1–4, 2–3 |
| Use patterns | |||||
| Duration a | 2.20 (0.66) | 7.44 (2.69) | 14.66 (7.57) | 49.81 (21.80) | All possible pairs |
| Single login | 100% | 97.37% | 98.77% | 75.36% | 1–4, 2–4, 3–4 |
| Completion of assessment | 100% | 100% | 97.53% | 91.30% | 1–4 |
| Evening responses | 3.7% | 17.11% | 14.81% | 11.59% | 1–2 |
| Response to reminders | 64.20% | 46.05% | 38.27% | 31.88% | 1–3, 1–4, |
| User experiences | |||||
| Ease of use a | 4.28 (0.97) | 4.08 (1.24) | 3.81 (1.23) | 4.02 (1.17) | None |
| Privacy concern a | 1.14 (0.43) | 1.10 (0.36) | 1.10 (0.40) | 1.02 (0.08) | None |
| Burden of participation a | 1.47 (0.68) | 1.36 (0.53) | 1.57 (0.72) | 1.57 (0.61) | None |
| Difficulty in remembering a | 1.14 (0.32) | 1.21 (0.31) | 1.17 (0.37) | 1.15 (0.30) | None |
| Embarrassment about questions a | 1.13 (0.38) | 1.12 (0.47) | 1.11 (0.37) | 1.05 (0.18) | None |
a
Mean (standard deviation)
b
Type I experimentwise error rate was controlled at the level of 0.05.