Table 2.

Multivariable logistic model for primary care office recruitment among all eligible primary care offices (n = 821; c statistic = 0.622)

		Odds Ratio	95% Confidence Interval
No. eligible patients ≥ 90th percentile*		2.68	1.67	4.31
Chlamydia screening rate**
	Lower tertile	-	-	-
	Middle tertile	1.09	0.77	1.56
	Upper tertile	0.94	0.66	1.36
No. eligible physicians ≥ 90th percentile†		1.93	1.23	3.03
Physicians‡
Age, mean (years)		1.01	0.99	1.03
Female, mean (%)		0.83	0.51	1.36
	Ethnicity
	White, mean (%)	-	-	-
	African American, mean (%)	0.61	0.27	1.40
	Asian, mean (%)	1.01	0.50	2.05
	Hispanic, mean (%)	0.79	0.30	2.07
	Specialty
	Internal medicine, mean (%)	-	-	-
	Family medicine/general practice, mean (%)	1.12	0.78	1.62
	Pediatrics, mean (%)	1.56	0.87	2.83
Doctor of osteopathy, mean (%)		1.04	0.63	1.71
International medical graduate, mean (%)		1.33	0.75	2.36

Recruited offices had at least 1 physician provide an email address for subsequent contact.

Eligible offices had at least 1 eligible physician with at least 20 female patients who were candidates for Chlamydia screening according to HEDIS Technical Specifications, 2000. The number is reduced due to missing data.

^* Dichotomous variable indicating whether number of eligible patients in office was ≥ 90th percentile for number of eligible patients in all offices.

^** Chlamydia screening rates were determined from HEDIS Technical Specifications, 2000.

^† Dichotomous variable indicating whether number of eligible physicians in office was ≥ 90th percentile for number of eligible physicians in all offices.

^‡ Physician characteristics were summarized at office level as unweighted averages across all offices. Odds represent one-unit increase.