FIGURE 4.

Latent Change Score Model of POP-C Intervention Effects on Study Outcomes Mediated by Intervention Components and Perceived Control (N = 236)

Δ—change; med—medication; pharma—pharmacologic; POP-C—Power Over Pain–Coaching

Note. The observed variables are shown in rectangles and the latent constructs in ovals. The unlabeled circles are error random variables that are correlated with other error random variables. These correlated errors are not part of the a priori model specification but were added to improve model fit. With these specifications, the model had a good fit to the data (χ² = 75.57, df = 47, p = 0.005, χ²/df = 1.61, Root Mean Square Error of Approximation = 0.051, 95% confidence interval [0.028, 0.071], comparative fit index = 0.93), and all path coefficients were significant except the covariate pathway from metastasized to Δ in pain and the residual correlation between Δ in cognitive control and Δ in feelings of control.