Outcome measure | Patients with a history of peptic ulcer who have been prescribed a non-selective NSAID | Patients with asthma who have been prescribed a beta-blocker | Patients aged 75 years and older prescribed an ACE inhibitor or a loop diuretic long-term without a check of their renal function and electrolytes in the previous 15 months |
---|---|---|---|
Median error rate1 (Interquartile range) | 5.76% (3.76% – 7.85%) | 1.90% (1.27% – 3.08%) | 19.80% (15.13% – 32.69%) |
Error rate in control group (assuming 11% reduction) | 5.13% | 1.69% | 17.62% |
Error rate in intervention group (assuming 50% reduction) | 2.88% | 0.95% | 9.90% |
Intraclass Correlation Coefficient (ICC)1 | 0.01082 | 0.00657 | 0.00952 |
Cluster size1 | 63 | 439 | 105 |
Inflation factor | 1.7 | 3.9 | 2.0 |
Total number of practices required | 64 | 66 | 12 |