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Table 4 Results of fully adjusted multilevel models for comparing differences in episodic memory trajectories by HRB clustering and country among womena

From: Comparing relationships between health-related behaviour clustering and episodic memory trajectories in the United States of America and England: a longitudinal study

Fixed effects England (N = 4722) vs USA (N = 10,396)
b (95%CI) P-value
Intercept 12.21 (12.01, 12.41)  < 0.001
Age -0.09 (-0.10, -0.18)  < 0.001
Age2 -0.0047 (-0.0050, -0.003)  < 0.001
HRB clustering
 Multi-HRB Reference  
 Inactive cluster -0.17 (-0.30, -0.05) 0.007
 Ex-smoking cluster 0.48 (0.37, 0.60)  < 0.001
Interaction: HRB clustering x age
 Inactive cluster -0.003 (-0.01, 0.01) 0.626
 Ex-smoking cluster 0.003 (-0.007, 0.01) 0.514
Country
 England versus the USA: multi-HRB cluster 1.97 (1.77, 2.16)  < 0.001
Interactions: HRB clustering x country
 England versus the USA: (inactive cluster versus multi-HRB cluster) 0.17 (-0.04, 0.37) 0.105
 England versus the USA: (ex-smoking cluster versus multi-HRB cluster) -1.73 (-1.97, -1.49)  < 0.001
Interactions: HRB clustering x country x age
 England versus the USA: multi-HRB cluster -0.04 (-0.05, -0.02)  < 0.001
 England versus the USA: inactive cluster -0.03 (-0.04, -0.01) 0.001
 England versus the USA: ex-smoking cluster -0.06 (-0.07, -0.04)  < 0.001
Random effects S.D. (95%CIs)  
Level 1: residual 2.35 (2.34, 2.37)  
Level 2: intercept 2.06 (2.02, 2.10)  
Level 2: age 0.05 (0.04, 0.06)  
  1. a Each model with a quadratic trend over age was adjusted for birth cohort, marital status, education, wealth, long-term conditions, country, and interactions between age and HRB clustering, age and country, as well as among age, HRB clustering and country.
  2. 95%CI 95% Confidence interval