89, p = .43, selleck chem CFI = 1.00, RMSEA = 0.03, 95% CI = 0�C0.07, Standardized Root Mean Square Residual (SRMR) = 0.04, the addition of a quadratic trend resulted in a significantly better model fit, �֦�(14,222)2=19.19, p = .02. The continuous model with a quadratic trend fit the data well, ��(14,222)2=8.69, p = .85, CFI = 1.00, RMSEA = 0.00, 95% CI = 0�C0.04, SRMR = 0.02. As such, our two-part model included a binary linear growth part along with a quadratic continuous part. A graphic representation of the two-part model is presented in Figure 1 with standardized regression coefficients for significant paths only. Table 3 provides the statistics for the model regressions. Table 3. Unstandardized Regression Coefficients, Standard Errors, z-Statistics, and p Values for All Model Regressions Figure 1.
The effects of hedonic capacity on the number of cigarettes smoked over time (spring Grade 10 through fall Grade 12). Note: Only significant paths with standardized path coefficients are shown in the model. Effect of Hedonic Capacity on Whether an Adolescent Smoked in the Past Month (Binary Model) Baseline Level Compared with participants with high hedonic capacity, participants low in hedonic capacity were over two and a half times (odds ratio [OR] = 2.64, 95% CI = 1.08�C6.45) more likely to have smoked a cigarette in the past thirty days. Peers smoking (OR = 3.30, 95% CI = 2.65�C4.12) and depressive symptoms (OR = 1.05, 95% CI = 1.01�C1.09) were also associated with an increased risk of smoking a cigarette in the past thirty days. In contrast, an SD (= 2.
83) increase in parental monitoring was associated with a 46% reduction (OR = 0.54, 95% CI = 0.36�C0.82) in the odds of smoking a cigarette in the past thirty days. Being Black (OR = 0.21, 95% CI = 0.05�C0.95) or another race (OR = 0.06, 95% CI = 0.01�C0.47) was also associated with a decreased likelihood of smoking a cigarette in the past thirty days compared with being White. Linear Trend While those low in hedonic capacity were more likely to have smoked a cigarette in the past thirty days at baseline compared with adolescents high in hedonic capacity, low hedonic capacity did not significantly increase GSK-3 the odds of smoking a cigarette in the past month at subsequent time points. Being female (OR = 0.70, 95% CI = 0.50�C0.98) and peer smoking (OR = 0.88, 95% CI = 0.82�C0.94) were both associated with a decreased rate of acceleration in the likelihood of smoking a cigarette in the past thirty days for each six month increase in time. In contrast, having at least one household member whom smokes was associated with a 53% increase (OR = 1.53, 95% CI = 1.08�C2.16) in the odds of progressing to smoking a cigarette for each six-month increase in time.
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