| DIN (n = 141) | GPRD (n = 464) | ||||||
---|---|---|---|---|---|---|---|---|
 | Lower quartile | Median | Upper quartile | % variation between practices due to sampling variation | Lower quartile | Median | Upper quartile | % variation between practices due to sampling variation |
No. of days with a prescription issued | 16.4 | 18.5 | 22.3 | 5.2% | 15.5 | 18.4 | 22.5 | 8.3% |
No. of days with diagnostic codes | 10.6 | 15.4 | 20.0 | 1.5% | 18.5 | 21.9 | 25.6 | 8.5% |
No. of days with diagnostic codes or drugs linked to existing diagnostic codes | 18.8 | 22.9 | 27.3 | 4.8% | _ | _ | _ | _ |
No. of days with either diagnostic or drugs or both codes | 21.1 | 25.6 | 30.8 | 4.8% | 22.5 | 25.7 | 30.7 | 9.9% |