TABLE 3.

HPV Vaccine Series Initiation and Completion Rates by Patient and Practice Characteristics

Patient and Practice Features	n	Vaccine Initiation		Vaccine Completion
		%	Adjusted RR (95% CI)a	%	Adjusted RR (95% CI)a
New York
Age, y
11.0–12.9	13 412	46.7	Reference	36.0	Reference
13.0–14.9	9832	33.7	0.72 (0.66–0.78)*	29.2	0.83 (0.77–0.89)*
15.0–17.9	7372	24.5	0.55 (0.49–0.61)*	19.7	0.57 (0.52–0.62)*
Sex
Female	14 402	37.2	Reference	30.6	Reference
Male	16 214	37.1	1.00 (0.95–1.06)	28.6	0.94 (0.89–1.00)
Practice type
Family medicine	2828	30.0	Reference	26.1	Reference
Pediatrics	25 353	38.8	1.31 (1.14–1.52)*	30.0	1.27 (0.80–2.02)
CHC or RHC	2435	26.9	0.92 (0.66–1.29)	28.6	1.19 (0.39–3.62)
Rurality
Downstate	14 921	36.6	Reference	27.5	Reference
Upstate rural	2614	37.1	0.96 (0.80–1.14)	28.7	1.14 (0.76–1.71)
Upstate urban	13 081	37.8	0.98 (0.87–1.10)	32.2	1.15 (0.90–1.46)
Colorado
Age, y
11.0–12.9	14 122	39.4	Reference	34.5	Reference
13.0–14.9	7828	31.8	0.81 (0.79–0.83)*	30.1	0.88 (0.86–0.90)*
15.0–17.9	9552	20.2	0.53 (0.52–0.55)*	15.0	0.46 (0.44–0.47)*
Sex
Female	14 824	33.3	Reference	28.6	Reference
Male	16 678	31.1	0.97 (0.95–0.99)*	26.5	0.95 (0.93–0.97)*
Practice type
Family medicine	7177	27.1	Reference	21.5	Reference
Pediatrics	18 107	33.9	1.17 (1.09–1.25)*	29.2	1.32 (1.22–1.42)*
CHC or RHC	6218	33.1	1.20 (1.11–1.30)*	29.2	1.32 (1.21–1.44)*
Rurality
Rural	3661	28.5	0.93 (0.86–1.00)	26.6	0.96 (0.88–1.04)
Urban	27 841	32.6	Reference	27.6	Reference

CHC, community health center; RHC, rural health center.

^aThe adjusted estimates are adjusted for all other covariates in the table plus study arm (0, 1, 2, or 3 C-R/R messages).

^*P < .05