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Table 4 Prevalence and standardised prevalence ratios of asthma 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 1320 1297 11.0 1.02
Practice 2 8004 815 855 10.2 0.95
Practice 3 7085 828 753 11.7 1.10
Practice 4 4140 332 440 8.0 0.76
Practice 5 2464 162 266 6.6 0.61
Total 33,725 3457 3605 10.3 0.96
  1. Note: SPR Standardised prevalence ratio