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Table 3 Prevalence and standardised prevalence ratios of COPD by medical practice

From: Practical utility of general practice data capture and spatial analysis for understanding COPD and asthma

  Active patients Observed cases Expected cases Prevalence (=O/A*100%) SPR (=O/E)
Practice 1 12,032 374 409 3.1 0.91
Practice 2 8004 345 290 4.3 1.19
Practice 3 7085 243 269 3.4 0.90
Practice 4 4140 103 154 2.5 0.67
Practice 5 2464 65 77 2.6 0.84
Total 33,725 1130 1228 3.4 0.92
  1. Note: SPR Standardised prevalence ratio