TABLE 1.

Sample Characteristics

	QI (13 Clinics; 42 Physicians)		Control (12 Clinics; 35 Physicians)		P
	Mean	SD	Mean	SD
Patients per clinic	883.2	453.9	958.4	520.0	.35
Physicians per clinic	3.2	1.7	2.9	1.6	.32
Baseline HPV vaccination coverage (≥1 dose)	52.6	16.1	44.6	17.7	.02

P values are derived from t tests for differences by clinic size and physician vaccination coverage.