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Table 4 Estimated variances (and standard errors), percent explained variance and intra-cluster correlations for physical and mental component scores (number of patients = 6997; number of practices = 96)

From: Quality of life of Australian chronically-ill adults: patient and practice characteristics matter

Random parameters Estimated variance
  Baseline model Full model % Explained variance
Physical component scores    
Level 2, Practice variance 4.40 (0.92) 0.60 (0.25)* 72.9
Level 1, Patient variance 135.67 (2.31) 80.07 (1.36) 42.4
Intracluster correlation 0.031 0.007  
Deviance 54326.89 50565.05  
Mental component scores    
Level 2, Practice variance 1.32 (0.43) 0.19 (0.21) 49.2
Level 1, Patient variance 121.59 (2.07) 97.0 (1.65) 20.9
Intracluster correlation 0.011 0.002  
Deviance 53501.64 51877.94  
  1. Note: *P < 0.05, P < 0.01, P < 0.001