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Table 5 Auto-correlation matrices for the eight dimensions of the SF-36 from RA patients in the Early RA study assessed at seven time points

From: The use of bootstrap methods for analysing health-related quality of life outcomes (particularly the SF-36)

a) Physical Function (n = 218) e) Vitality (n = 216)
Week 0 8 16 24 32 40 48 Week 0 8 16 24 32 40 48
0 1.00        0 1.00       
8 0.61 1.00       8 0.55 1.00      
16 0.63 0.74 1.00      16 0.48 0.58 1.00     
24 0.57 0.69 0.75 1.00     24 0.47 0.54 0.71 1.00    
32 0.56 0.68 0.80 0.79 1.00    32 0.50 0.59 0.68 0.71 1.00   
40 0.55 0.67 0.77 0.81 0.86 1.00   40 0.42 0.49 0.67 0.68 0.77 1.00  
48 0.53 0.64 0.74 0.81 0.81 0.85 1.00 48 0.47 0.53 0.66 0.72 0.72 0.76 1.00
b) Role Physical (n = 212) f) Social Function (n = 219)
Week 0 8 16 24 32 40 48 Week 0 8 16 24 32 40 48
0 1.00        0 1.00       
8 0.40 1.00       8 0.44 1.00      
16 0.35 0.53 1.00      16 0.43 0.53 1.00     
24 0.29 0.39 0.57 1.00     24 0.39 0.55 0.63 1.00    
32 0.19 0.30 0.56 0.67 1.00    32 0.36 0.46 0.63 0.70 1.00   
40 0.34 0.42 0.52 0.60 0.61 1.00   40 0.38 0.51 0.58 0.64 0.71 1.00  
48 0.27 0.40 0.59 0.67 0.64 0.71 1.00 48 0.34 0.45 0.58 0.64 0.71 0.71 1.00
c) Bodily Pain (n = 219) g) Role Emotional (n = 206)
Week 0 8 16 24 32 40 48 Week 0 8 16 24 32 40 48
0 1.00        0 1.00       
8 0.43 1.00       8 0.46 1.00      
16 0.45 0.55 1.00      16 0.35 0.47 1.00     
24 0.44 0.47 0.61 1.00     24 0.34 0.40 0.59 1.00    
32 0.37 0.46 0.51 0.68 1.00    32 0.31 0.32 0.56 0.62 1.00   
40 0.40 0.42 0.57 0.60 0.69 1.00   40 0.34 0.46 0.53 0.56 0.54 1.00  
48 0.42 0.46 0.59 0.63 0.68 0.76 1.00 48 0.31 0.37 0.49 0.58 0.54 0.69 1.00
d) General Health (n = 209) h) Mental Health (n = 218)
Week 0 8 16 24 32 40 48 Week 0 8 16 24 32 40 48
0 1.00        0 1.00       
8 0.55 1.00       8 0.57 1.00      
16 0.56 0.68 1.00      16 0.57 0.62 1.00     
24 0.60 0.67 0.80 1.00     24 0.55 0.59 0.72 1.00    
32 0.58 0.67 0.77 0.83 1.00    32 0.52 0.55 0.65 0.69 1.00   
40 0.59 0.65 0.72 0.79 0.84 1.00   40 0.50 0.54 0.70 0.70 0.74 1.00  
48 0.58 0.65 0.75 0.84 0.82 0.85 1.00 48 0.56 0.55 0.68 0.72 0.73 0.77 1.00
  1. Correlations are Pearson's product moment coefficient.