Table 2.

Participation Rate, by Practitioner/Practice Characteristics.

Practitioner/Practice Characteristics	Overall		Participated		Of Followed-Up by Regional Coordinators (n = 411)		Of Participated
					Participated (n = 189)		On Paper
	n	%	n	%	n	%	n	%
Gender
Female	389	23	331	85	39	40	62	19
Male	1,292	77	1,130	87	149	48	290	26
			p = .2		p = .15		p = .01
Race ethnicitya
White	1,321	79	1,156	88	145	47	292	25
Black/African American	82	5	65	79	9	35	16	25
Asian/Pacific Islander	163	10	145	89	21	54	24	17
Other	12	1	9	75	1	25	1	11
Hispanic/Latino	91	5	78	86	12	46	18	23
			p = .14		p = .5		p = .2
Age (years)
<35	186	11	157	84	23	44	14	9
35–44	367	22	328	89	46	55	64	20
45–54	350	21	305	87	46	51	90	30
55–64	592	35	520	88	59	44	136	26
65 and older	186	11	154	83	14	31	48	31
			p = .2		p = .10		p < .001
Years since dental school graduation
<10	318	19	274	86	43	50	38	14
10–19	334	20	296	89	44	54	66	22
20–29	382	23	334	87	43	46	96	29
30+	655	39	563	86	57	39	153	27
			p = .6		p = .10		p < .001
Additional formal training after dental school
No	1,009	60	865	86	108	43	228	26
Yes	686	41	605	88	81	51	125	21
			p = .14		p = .13		p = .02
Membership in any dental organizations
No	228	13	184	81	24	36	43	23
Yes	1,467	87	1,286	88	165	48	310	24
			p = .004		p = .09		p = .8
Practice
Practice type
Owner of private practice	1,239	74	1,082	87	134	46	299	28
Associate of small group private practice	215	13	174	81	27	40	29	17
Member large group practice (HP/PDA)b	103	6	98	95	11	69	8	8
Public, community, and publicly funded	70	4	62	89	9	53	11	18
Federal government, academic, and other managed care	59	4	49	83	8	42	5	10
			p = .007		p = .3		p< .001
More than one practice location
No	1,428	84	1,239	87	154	45	307	25
Yes	263	16	230	87	35	53	46	20
			p = .8		p = .2		p = .12
Locale of practice
Urban—inner city	184	11	156	85	28	49	39	25
Urban—not inner city	449	27	400	89	51	50	101	25
Suburban	760	45	660	87	76	44	144	22
Rural	289	17	251	87	33	47	68	27
			p = .5		p = .8		p = .3
Patient population
Percent patients with private insurance
< 40	244	15	202	83	35	45	48	24
40–79	987	60	865	88	103	46	224	26
			p = .09		p = .9		p = .06
Percent patients who come in regularly
< 50	310	19	265	85	42	49	63	24
50–79	995	60	868	87	106	46	212	24
80+	351	21	311	89	35	45	69	22
			p = .5		p = .8		p = .7
Regionc
Western	186	11	173	93	21	64	25	14
Midwest	162	10	135	83	16	38	25	19
South Central	390	23	344	88	51	53	112	33
South Atlantic	288	17	252	88	20	36	63	25
Northeast	360	21	310	86	32	39	72	23
			p = .02		p = .06		p < .001

^aAlthough race and Hispanic/Latino ethnicity are separate questions in the Enrollment Questionnaire, some Hispanic/Latino participants did not provide a race or indicated “Hispanic/Latino” as their race, thus race and ethnicity were combined.

^bEither HealthPartners Dental Group in greater Minneapolis, MN, or Permanente Dental Associates in greater Portland, OR.

^cReported on Enrollment Questionnaire as the state, subsequently categorized into one of the six regions of the network.