Table 2.
Behavior dyads—proportions within groups who changed on one or both behaviors and coaction odds ratiosa at 12 and 24 months#.
| Sun protection and diet | 12 Months | 24 Months | ||
|---|---|---|---|---|
|
|
|
|||
| Treatment (n=1407) |
Control (n=1926) |
Treatment (n=1310) |
Control (n=1764) |
|
|
| ||||
| Proportion changed on sun protection given change on diet | 0.24 [0.19, 0.29] |
0.14 [0.10, 0.18] |
0.35 [0.29, 0.40] |
0.15 [0.10, 0.19] |
| Proportion changed on sun protection given no change on diet | 0.16 [0.14, 0.18] |
0.12 [0.10, 0.13] |
0.20 [0.17, 0.22] |
0.12 [0.10, 0.14] |
| Coaction odds ratioa |
1.71* [1.23, 2.36] |
1.28 [0.88, 1.87] |
2.17* [1.62, 2.90] |
1.23 [0.85, 1.77] |
| Smoking and diet | Treatment (n=412) |
Control (n=597) |
Treatment (n=360) |
Control (n=539) |
|
| ||||
| Proportion changed on smoking given change on diet | 0.20 [0.09, 0.31] |
0.13 [0.05, 0.22] |
0.26 [0.16, 0.37] |
0.17 [0.09, 0.26] |
| Proportion changed on smoking given no change on diet | 0.14 [0.10, 0.18] |
0.12 [0.09, 0.14] |
0.22 [0.17, 0.26] |
0.18 [0.14, 0.21] |
| Coaction odds ratioa |
1.54 [0.74, 3.17] |
1.17 [0.55, 2.48] |
1.28 [0.69, 2.37] |
0.94 [0.50, 1.80] |
| Smoking and sun protection | Treatment (n=440) |
Control (n=576) |
Treatment (n=388) |
Control (n=520) |
|
| ||||
| Proportion changed on smoking given change on sun protection | 0.20 [0.10, 0.30] |
0.09 [0.02, 0.16] |
0.24 [0.14, 0.33] |
0.14 [0.06, 0.23] |
| Proportion changed on s no change on sun protection moking given | 0.15 [0.12, 0.19] |
0.11 [0.08, 0.14] |
0.23 [0.19, 0.28] |
0.18 [0.14, 0.21] |
| Coaction odds ratioa |
1.40 [0.71, 2.73] |
0.81 [0.34, 1.96] |
1.01 [0.55, 1.85] |
0.80 [0.38, 1.69] |
*
p<.001.
a
Odds of change on second behavior given change on a first behavior.
#
Recruited in 1999 in the United States.