Table 4.
GEE regression results
| B | SE | Exp(B) | Wald X2 | p | |
|---|---|---|---|---|---|
| Dependent variable: Days used (n = 111/93/75) | |||||
| Time | – | – | – | 27.512 | < .001 |
| RCQ | – | – | – | 8.411 | .004 |
| RCQ x Time | – | – | – | 11.593 | .003* |
| Gender | .064 | .0652 | 1.066 | .959 | .327 |
| Reduce vs Quit | .117 | .0592 | 1.124 | 3.887 | .049 |
| Past attempt | .145 | .0906 | 1.156 | 2.550 | .110 |
| Dependent variable: DTCQ8 (n = 111/93/75) | |||||
| Time | – | – | – | 3.274 | .195 |
| RCQ | – | – | – | 8.543 | .003* |
| RCQ x Time | – | – | – | .780 | .677 |
| Gender | .115 | .3397 | .892 | .114 | .735 |
| Reduce vs Quit | −.433 | .3501 | 1.541 | 1.528 | .216 |
| Past attempt | −.392 | .3475 | 1.480 | 1.272 | .259 |
| Dependent variable: SDS score (n = 98a/93/75) | |||||
| Time | – | – | – | 13.920 | .001* |
| RCQ | – | – | – | 16.034 | < .001* |
| RCQ x Time | – | – | – | .466 | .792 |
| Gender | −.038 | .1246 | .962 | .095 | .758 |
| Reduce vs Quit | .458 | .1097 | 1.581 | 17.430 | < .001* |
| Past attempt | .302 | .1293 | 1.353 | 5.465 | .019 |
| Dependent variable: CPQ score (n = 111/93/75) | |||||
| Time | – | – | – | 61.172 | < .001* |
| RCQ | – | – | – | 2.824 | .093 |
| RCQ x Time | – | – | – | 5.278 | .071 |
| Gender | −.082 | .6818 | .921 | .014 | .904 |
| Reduce vs Quit | 1.159 | .7092 | 3.185 | 2.669 | .102 |
| Past attempt | 1.445 | .7204 | 4.240 | 4.020 | .045 |
asome participants had items of the SDS questionnaire missing at baseline due to a questionnaire error. These participants were omitted from these analyses
* p < .015