Table 2.

Adolescent and Provider Characteristics of Initiators (n = 6,123) and Non-initiators (n = 8,017).

		Initiators (n = 6,123)		Non-initiators (n = 8,017)
		n/mean	%/ SD	n/mean	%/SD	p-value
Adolescent Characteristics
	Male	2820	46.06	4453	44.46	<0.001
	Female	3303	53.94	3564	55.54
	Birth year 2001	1093	17.85	2457	31.77	<0.001
	Birth year 2002	1251	20.43	2124	26.49
	Birth year 2003	1144	18.68	1437	17.92
	Birth year 2004	1235	20.17	970	12.10
	Birth year 2005	1400	22.86	939	11.71
	No other adolescent vaccines	578	9.44	2721	33.94	<0.001
	Tdap or MenACWY	789	12.89	1803	22.49
	Tdap and MenACWY	4756	77.67	3493	43.57
	Influenza vaccines	0.81	0.98	0.46	0.87	<0.001
	Well-child visits	1.61	0.90	1.28	0.99	<0.001
	Total MOs	4.622	3.42	5.67	3.52	<0.001
Provider Characteristics	Pediatrician	1412	23.06	1579	19.70	<0.001
	Other type of provider	4711	76.94	6438	80.30
	Birth year	1966.89	8.09	1965.97	7.68	<0.001
	Rural	2577	42.09	4144	51.69	<0.001
	Urban	3456	57.91	3873	48.31