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Table 2 Estimated trajectory classes and group-specific growth parameters of health-related quality of life (N = 281)

From: Effects of interventions on trajectories of health-related quality of life among older patients with hip fracture: a prospective randomized controlled trial

Growth parameter PCS classes MCS classes
Poor Moderate Good Poor Moderate Good
Intercept 3.72*** 3.71*** 3.83*** 3.75*** 3.95*** 4.11***
Linear slope 0.04*** 0.08*** 0.11*** -0.010 * -0.007** -0.005***
Quadratic slope -0.002** -0.004*** -0.006***    
Group proportion 36.65 34.16 29.18 13.87 29.89 56.23
Alpha0 -21.28    -21.14   
Alpha1 0.26    -0.23   
Alpha2 -0.05      
Model fit statistics
 BIC (N =1018) -3545.68    -3578.91   
 BIC (N =281) -3536.67    -3572.48   
 AIC fit index -3511.21    -3554.29   
 Log likelihood -3497.21    -3544.29   
  1. BIC Bayesian information criterion, AIC Akaike’s information criterion, PCS physical component summary score, MCS mental component summary score
  2. Level 1, N = 1018, and Level 2, N = 281
  3. * p < 0.05, ** p < 0.01, *** p < 0.001