Table 2 Survey practices and sample physicians
B: Number of physicians and practices among treatment and control group | ||||||
|---|---|---|---|---|---|---|
| Â | Number of practices | Number of physicians | ||||
| Â | Comparison | Treatment | Total | Comparison | Treatment | Total |
2007 | 11 | 11 | 22 | 67 | 100 | 167 |
2008 | 4 | 4 | 8 | 17 | 35 | 52 |
2009 | 8 | 8 | 16 | 97 | 117 | 214 |
Total | 23 | 23 | 46 | 181 | 252 | 433 |