Table 3.
Factors Associated with Presence of Any Registry—Multivariate Logistic Regression
| Independent Variables | Odds Ratio (95% Confidence Interval) |
|---|---|
| External incentives variables | |
| Outside reporting index (range 0 to 4) | 1.2† (1.1, 1.4) |
| Income for quality | 1.1 (.81, 1.5) |
| Public recognition for quality | 2.2† (1.5, 3.1) |
| Clinical IT index (range 0 to 6) | 1.1‡ (1.03, 1.2) |
| % delegation for hospitalization utilization management | 1.008† (1.004, 1.01) |
| Medical group (vs IPA) | 1.5 (.91, 2.4) |
| Specialty type (multispecialty as referent) | |
| Specialty only | 1.3 (.77, 2.3) |
| Primary care only | .91 (.57, 1.5) |
| Size (less than 100 MDs as referent) | |
| 100 to 199 MDs | 1.06 (.70, 1.6) |
| 200 or more MDs | 1.6‡ (1.03, 2.4) |
| County HMO penetration* | 1.005 (.99, 1.01) |
| Ownership type (MD owned as referent) | |
| Hospital or HMO owned | 1.5‡ (1.09, 2.1) |
| Other owned | 1.8‡ (1.1, 2.8) |
| Age of PO | 1.005 (.99, 1.01) |
| Number of different clinic locations | 1.00 (.999, 1.001) |
C-statistic=.73
Hosmer and Lemeshow Goodness of Fit Test=18.0 (P=.02)
*
Interstudy data20
‡
P<.05.
†
P<.001.
IT, information technology;IPA, Independent Practice Association; MD, medical director; PO, physician organizations.