| DIN | GPRD | ||||||
---|---|---|---|---|---|---|---|---|
 | 1989–93 births (n = 20,149) | 1994–97 births (n = 20,034) | 1989–1997 births (n = 40,183) | 1989–93 births (n = 76,310) | ||||
 | Mean | Mean | Mean | Median | IQR | Mean | Median | IQR |
No. of days with a prescription issued | 19.6 | 19.4 | 19.5 | 14 | 8–24 | 19.8 | 15 | 9–26 |
No. of days with diagnostic codes | 15.8 | 15.7 | 15.8 | 13 | 8–21 | 22.9 | 20 | 13–30 |
No. of days with diagnostic codes or drugs linked to existing diagnostic codes | 23.0 | 23.2 | 23.1 | 18 | 10–30 | _ | _ | _ |
No. of days with either diagnostic or drugs or both codes | 25.9 | 26.0 | 26.0 | 20 | 12–33 | 27.4 | 23 | 14–35 |