Adverse event (AE) rate per quarter
| Quarter ending | Number of AEs | Number of patient attendances (n=250) | AE rate (% of patient attendances) (n=20050) |
|---|---|---|---|
| *Pre-intervention period. χ2=120.43; df=7; p<0.0001. χ2TR=87.64; df=1; p<0.0001. | |||
| December 1997* | 84 | 2575 | 3.26 |
| March 1998 | 38 | 2371 | 1.60 |
| June 1998 | 37 | 2461 | 1.50 |
| September 1998 | 20 | 2392 | 0.83 |
| December 1998 | 26 | 2664 | 0.97 |
| March 1999 | 16 | 2720 | 0.58 |
| June 1999 | 17 | 2373 | 0.71 |
| September 1999 | 12 | 2494 | 0.48 |