Table 1.

Comparison of Family Medicine Trained and/or Board Certified Emergency Physicians by Board Certification

Characteristics	All Family Medicine EPs, n = 4354		Family Medicine Board Certification, n = 3596		General Emergency Medicine Board Certification, n = 388		Neither Family Medicine nor Emergency Medicine Board Certification, n = 51		No Board Certification, n = 319
	n	%	n	%	n	%	n	%	n	%	P Value^*
Demographics
Age, y (median [IQR])	4354	65 (59 to 69)	3596	64 (59 to 69)	388	66 (58 to 70)	51	67 (62 to 71)	319	65 (60 to 71)	<0.001
Age categories, y											<0.001
25 to 44	138	3	110	3	14	4	1	2	13	4
45 to 64	1991	46	1701	47	135	35	21	41	134	42
≥65	2225	51	1785	50	239	62	29	57	172	54
Female sex	531	12	429	12	56	14	5	10	41	13	0.48
International medical graduate	701	16	589	16	33	9	8	16	71	22	<0.001
Geography
US Census division											<0.001
New England	175	4	149	4	15	4	2	4	9	3
Mid Atlantic	341	8	281	8	34	9	4	8	22	7
East North Central	590	14	496	14	36	9	9	18	49	16
West North Central	391	9	349	10	19	5	2	4	21	7
South Atlantic	903	21	728	20	100	26	8	16	67	22
East South Central	415	10	341	10	28	7	5	10	41	13
West South Central	586	14	491	14	33	9	10	20	52	17
Mountain	366	8	305	9	40	10	5	10	16	5
Pacific	561	13	441	12	80	21	6	12	34	11
MSA population size											<0.001
≥1,000,000	1722	40	1367	38	203	52	26	51	126	40
250,000 to 999,999	939	22	801	22	74	19	9	18	55	17
100,000 to 249,999	474	11	398	11	38	10	4	8	34	11
<100,000	65	1	54	2	4	1	2	4	5	2
Unknown	1154	27	976	27	69	18	10	20	99	31
Urban influence											<0.001
Urban	3402	79	2781	78	340	88	40	78	241	76
Large rural	560	13	479	13	33	9	7	14	41	13
Small rural	372	9	322	9	12	3	4	8	34	11
Training
Residency											<0.001
Emergency medicine	403	9	176	5	200	52	3	6	24	8
Family medicine	3646	84	3181	88	162	42	21	41	282	88
Internal medicine	66	2	29	0.8	14	4	19	37	4	1
Pediatrics	11	0.3	6	0.2	3	0.8	2	4	0	0
Surgery	62	1	38	1	9	2	6	12	9	3
Internship only	58	1	58	2	0	0	0	0	0	0
Other residency	13	0.3	13	0.4	0	0	0	0	0	0
None	95	2	95	3	0	0	0	0	0	0
Years since completed medical training											0.006
<5	44	1	34	1	1	0.3	1	2	8	3
5 to 9	98	2	79	2	13	3	0	0	6	2
10 to 19	520	12	415	12	66	17	4	8	35	11
≥20	3597	84	2973	85	308	79	46	90	270	85
Primary specialty of emergency medicine	2563	59	2004	56	363	94	9	18	187	59	<0.001

EPs, emergency physicians; IQR, interquartile range; MSA, metropolitan statistical area.
↵* Bivariate comparisons were tested using Kruskal-Wallis, χ², and Fisher's exact tests, as appropriate.