Table 4.

Multivariable analysis of patient and clinic factors associated with HPV series initiation^a.

Variable	Odds ratio	95% Confidence interval	p-Value
Race
White	Ref	–	–
Black	1.06	0.91–1.24	0.4700
Other/not specified	0.78	0.66–0.93	0.0050
Age
9–10	0.03	0.02–0.05	<0.0001
11–12	Ref	–	–
13–15	1.44	1.25–1.65	<0.0001
16+	1.92	1.66–2.23	<0.0001
Insurance
Public	Ref	–	–
Private	0.52	0.45–0.59	<0.0001
No insurance	0.47	0.26–0.85	0.0124
Medical specialty
Pediatrics	Ref.	–	–
Family medicine	0.92	0.81–1.04	0.1981
Gynecology	0.24	0.18–0.33	<0.0001
Visit typeb
Problem-focused	Ref	–	–
Preventive	5.18	4.64–5.79	<0.0001

^aAdjusted for the factors listed in first column.

^b“Immunization-only” visits were eliminated from the analysis due to small cell sizes.