A longitudinal study of post-traumatic growth and rumination in patients undergoing continuous ambulatory peritoneal dialysis: A parallel process latent growth curve modelling approach.

Objective: To examine the longitudinal trajectories of post-traumatic growth (PTG) and event-related rumination among patients undergoing continuous ambulatory peritoneal dialysis (CAPD), and to explore the dynamic associations between intrusive/deliberate rumination and PTG using a parallel process latent growth curve model.

Methods: A total of 195 CAPD patients were followed over a 12-month period with assessments at four time points (baseline, 2nd, 6th, and 12th month). PTG and rumination were measured using the Chinese versions of the Post-Traumatic Growth Inventory and the Event-Related Rumination Inventory. Parallel process latent growth curve modelling was applied to examine individual trajectories and inter-relationships over time, adjusting for demographic and clinical covariates.

Results: Both PTG and rumination showed an initial decline from baseline to the 2nd month, followed by a slight increase through the 12-month follow-up. Intrusive rumination at baseline negatively predicted the slope of PTG, suggesting that higher initial IR levels were associated with a slower improvement in PTG. Education level was negatively associated with baseline PTG, and older age was positively associated with baseline IR. Deliberate rumination did not significantly predict PTG trajectory.

Conclusion: The findings reveal dynamic trajectories of PTG and rumination among CAPD patients and highlight intrusive rumination as a negative predictor of long-term psychological growth. Longitudinal monitoring and targeted cognitive interventions may support adaptive adjustment in this population.