ICCs (With 95% Empirical Bootstrap CIs) and VIFs Calculated for Practice-Level Variables, Collected on 89 Practices Within 8 PBRNs
| Within Network Statistics | ||
|---|---|---|
| Practice Level Variable | ICC (95% CI) | VIF |
| Practice type | 0.294 (0.187–0.499) | 3.82 |
| Use of electronic medical record | 0.229 (0.101–0.406) | 3.20 |
| Number of physician FTEs | 0.053 (0.000–0.427) | 1.51 |
| Number of staff FTEs | 0.036 (0.000–0.407) | 1.35 |
| Number of staff/physician FTEs | 0.062 (0.000–0.393) | 1.60 |
| Physician turnover rate | 0.110 (0.029–0.564) | 2.06 |
| Staff turnover rate | 0.066 (0.000–0.327) | 1.63 |
FTE=Full-time equivalent; ICC=intraclass correlation coefficient; PBRN=practice-based research network; VIF = variance inflation factor.
Note: crude mean cluster size = 11.125; adjusted mean cluster size = 10.59 clinics per network.