Table 1.
Marginal effects of experimental design factors on interactive feature utilization rates (95% CI).
| Factor | Interactive feature | ||||||
|
|
Set Quit Date | Choose Quit Smoking Aid |
Build Support System |
Track Smoking Triggers |
Beat Smoking Triggers |
Visit Community | |
| Personalization | |||||||
|
|
On | 84.5 (81.1 to 87.9) | 35.2 (30.9 to 39.6) | 14.6 (11.2 to 17.9) | 55.0 (50.4 to 59.5) | 16.8 (13.3 to 20.4) | 32.5 (28.2 to 36.8) |
|
|
Off | 85.7 (82.3 to 89.0) | 39.3 (34.9 to 43.7) | 12.3 (9.1 to 15.5) | 55.7 (51.1 to 60.2) | 15.0 (11.6 to 18.4) | 35.0 (30.6 to 39.4) |
|
|
Raw difference | −1.1 (−5.9 to 3.6) | −4.1 (−10.3 to 2.1) | 2.3 (−2.3 to 6.9) | −0.7 (−7.1 to 5.8) | 1.8 (−3.1 to 6.7) | −2.5 (−8.7 to 3.7) |
|
|
SMDa | −0.02 (−0.12 to 0.07) | −0.06 (−0.15 to 0.03) | 0.05 (−0.05 to 0.14) | −0.01 (−0.10 to 0.08) | 0.04 (−0.06 to 0.13) | −0.04 (−0.13 to 0.06) |
| Integration | |||||||
|
|
On | 84.5 (81.1 to 88.0) | 46.6 (42.0 to 52.2) | 19.3 (15.6 to 23.0) | 58.2 (53.6 to 62.7) | 17.7 (14.1 to 21.3) | 32.3 (28.0 to 36.6) |
|
|
Off | 85.7 (82.3 to 89.0) | 27.9 (23.8 to 32.1) | 7.5 (4.8 to 10.3) | 52.5 (47.9 to 57.1) | 14.1 (10.8 to 17.4) | 35.2 (30.8 to 39.6) |
|
|
Raw difference | −1.1 (−5.9 to 3.7) | 18.7 (12.5 to 24.8)b | 11.8 (7.2 to 16.4)b | 5.7 (−0.8 to 12.1) | 3.6 (−1.3 to 8.5) | −2.9 (−9.1 to 3.2) |
|
|
SMD | −0.02 (−0.12 to 0.07) | 0.28 (0.18 to 0.38)b | 0.25 (0.15 to 0.34)b | 0.08 (−0.01 to 0.17) | 0.07 (−0.03 to 0.17) | −0.04 (−0.14 to 0.05) |
| Dynamic Tailoring | |||||||
|
|
On | 87.0 (83.8 to 90.3) | 37.7 (33.3 to 42.1) | 16.6 (13.1 to 20.1) | 58.7 (54.1 to 63.1) | 18.6 (15.0 to 22.3) | 36.6 (32.1 to 41.0) |
|
|
Off | 83.1 (79.7 to 86.7) | 36.8 (32.5 to 41.2) | 10.3 (7.3 to 13.3) | 52.1 (47.4 to 56.7) | 13.2 (9.9 to 16.4) | 30.9 (26.6 to 35.2) |
|
|
Raw difference | 3.9 (−0.9 to 8.6) | 0.9 (−53 to 7.1) | 6.3 (1.7 to 10.9)c | 6.6 (0.1 to 13.1)d | 5.4 (0.5 to 10.3)d | 5.7 (−0.5 to 11.9) |
|
|
SMD | 0.08 (−.02 to 0.17) | 0.01 (−0.08 to 0.10) | 0.13 (0.04 to 0.23)c | .09 (0.00 to 0.19)d | .11 (0.01 to 0.20)d | .09 (−.01 to 0.18) |
| Intensity | |||||||
|
|
Tapered | 83.4 (79.9 to 86.9) | 38.2 (33.7 to 42.6) | 14.6 (11.2 to 17.9) | 56.4 (51.8 to 60.9) | 18.2 (14.6 to 21.8) | 31.4 (27.1 to 35.7) |
|
|
Abrupt | 86.8 (83.6 to 90.1) | 36.4 (32.0 to 40.7) | 12.3 (9.1 to 15.5) | 54.3 (49.7 to 58.9) | 13.6 (10.3 to 16.9) | 36.1 (31.7 to 40.6) |
|
|
Raw difference | −3.4 (−8.2 to 1.4) | 1.8 (−4.4 to 8.0) | 2.3 (−2.3 to 6.8) | 2.1 (−4.4 to 8.5) | 4.5 (−0.4 to 9.5) | −4.8 (−10.9 to 1.4) |
|
|
SMD | −0.07 (−0.16 to 0.03) | 0.03 (−0.06 to 0.12) | 0.05 (−0.05 to 0.14) | 0.03 (−0.06 to 0.12) | 0.09 (−0.01 to 0.18) | −0.07 (−0.16 to 0.02) |
aSMD: standardized mean difference.
bP<.001.
cP<.01.
dP<.05.