Table 3.
Longitudinal Trajectories of Cigarette Quantity
| Model 1 | Model 2 | |||
|---|---|---|---|---|
| Predictor | RR | 95% CI | RR | 95% CI |
| Intercept: husband | 1.59*** | [1.43, 1.77] | 1.62*** | [1.36, 1.92] |
| Intercept: wife | 1.10 | [0.96, 1.25] | 1.13 | [0.92, 1.37] |
| Time-invariant and time-varying covariates | ||||
| Baseline cigarette quantity: husband | 1.54*** | [1.49, 1.59] | 1.51*** | [1.44, 1.57] |
| Baseline cigarette quantity: wife | 1.65*** | [1.59, 1.72] | 1.63*** | [1.54, 1.72] |
| Baseline partner cigarette quantity | 0.99 | [0.97, 1.02] | 1.00 | [0.97, 1.04] |
| Baseline age in years | 0.99** | [0.98, 0.99] | 0.98** | [0.97, 0.99] |
| Baseline race/ethnicity (non-White) | 1.19** | [1.05, 1.34] | 1.17+ | [0.98, 1.40] |
| Baseline premarital cohabitation in months | 1.00 | [1.00, 1.00] | 1.01* | [1.00, 1.00] |
| Baseline children (yes) | 1.11 | [0.98, 1.25] | 1.12 | [0.94, 1.34] |
| Education: husband | 1.06+ | [1.00, 1.13] | 1.10* | [1.01, 1.20] |
| Education: wife | 0.94+ | [0.88, 1.00] | 0.96 | [0.85, 1.07] |
| Employed (yes) | 1.10+ | [1.00, 1.23] | 1.06 | [0.92, 1.33] |
| Income | 1.01 | [0.97, 1.05] | 1.01 | [0.96, 1.07] |
| Hypothesized predictors | ||||
| Time: husband | 0.96*** | [0.95, 0.98] | 0.96*** | [0.94, 0.98] |
| Time: wife | 0.99 | [0.98, 1.01] | 0.98 | [0.96, 1.01] |
| Baseline partner responsiveness | 1.01 | [0.93, 1.10] | 0.99 | [0.87, 1.12] |
| Baseline partner responsiveness (partner) | 1.01 | [0.93, 1.09] | 1.03 | [0.91, 1.16] |
| Time × Baseline Partner Responsiveness | 0.98* | [0.97, 0.99] | 0.99 | [0.97, 1.02] |
| Time × Baseline Partner Responsiveness (partner) | 1.01 | [1.00, 1.03] | 1.01 | [0.99, 1.04] |
| Hypothesized mediators | ||||
| Lagged partner cigarette quantity | 1.02 | [0.98, 1.07] | ||
| Lagged partner responsiveness | 0.98 | [0.90, 1.06] | ||
| Lagged partner responsiveness (partner) | 1.02 | [0.95, 1.10] | ||
| Concurrent partner responsiveness | 0.94+ | [0.87, 1.01] | ||
| Concurrent partner responsiveness (partner) | 0.99 | [0.92, 1.07] | ||
| Lagged birth of child (yes) | 1.01 | [0.91, 1.13] | ||
| Concurrent birth of child (yes): husband | 0.95 | [0.83, 1.08] | ||
| Concurrent birth of child (yes): wife | 0.71*** | [0.59, 0.86] | ||
Note. RR = risk ratio; CI = confidence interval.
Model 1 presents final results for the growth curve analysis. Model 2 presents the results of the mediation analyses. Results with each potential mediator entered separately were consistent with those presented; we present the results with all mediators entered simultaneously to conserve space. Time was coded 0, 1, 2, 4, 7, and 9. Time-varying predictors are italicized. Baseline race/ethnicity, baseline children, employed, lagged birth of child, and concurrent birth of child were all dichotomous, dummy-coded predictors. All other variables were treated as continuous. All baseline demographic covariates were grand mean centered. All time-varying demographic covariates were person-mean centered. Coefficients that did not differ significantly between husbands and wives were pooled across gender. Coefficients that differed significantly are presented on separate lines.
+ p < .10, *p <.05, **p < .01, ***p < .001