Table 1 Characteristics of practices by years took part in the vaccination study
Years provided vaccination records used in analyses | ||||
|---|---|---|---|---|
1997–1999 | 2000 | 1997–2000 | None | |
Jarman tertile | ||||
Low | 3 | 3 | 16 | 13 |
Med | 7 | 2 | 16 | 8 |
High | 1 | 2 | 23 | 12 |
SMR tertile | ||||
Low | 2 | 2 | 18 | 10 |
Med | 3 | 2 | 19 | 11 |
High | 6 | 3 | 18 | 12 |
List size | ||||
<5000 | 3 | 0 | 20 | 10 |
5000 or more | 8 | 7 | 35 | 23 |
Number of GPs | ||||
<7 | 10 | 6 | 51 | 31 |
7 or more | 1 | 1 | 4 | 2 |
11 | 7 | 55 | 33 | |