Inter-ethnic marriages and severity of coronary artery disease: A multicenter study of Arabian Gulf States

Table 1 Overall patient characteristic stratified by by ethnicity of spouse

	All (n = 685)	Intra-ethnic (n = 481)	Inter-ethnic (n = 204)	P value
Age (yr)	59 ± 12	58 ± 13	60 ± 12	0.0879
BMI (kg/m²)	28 ± 6	28 ± 6	27 ± 5	0.4009
Rural, n (%)	27	25	34	0.0148
DM, n (%)	56	57	54	0.5226
Hypertension, n (%)	57	54	64	0.0209
Smoking, n (%)	54	53	57	0.1428
Dyslipidemia, n (%)	66	65	68	0.4734
Past history, n (%)
CAD	45	45	45	0.9468
PCI	24	23	26	0.3263
CABG	6	5	9	0.0329
Atrial fibrillation	5	4	5	0.3990
CHF	13	13	11	0.5102
CVA	4	4	5	0.4388
CKD	14	14	13	0.7020
Depression	8	8	8	0.8363
PAD	2	2	3	0.1453
Ethnicity, n (%)				0.3597
Arabic gulf region	87	87	88
Arabic non-gulf	6	7	4
Non Arabic	7	6	8
No. of wives, n (%)				< 0.0001
1	68	81	38
2	19	13	32
3	10	5	22
4	3	1	8
Monthly income, n (%)				0.1760
$ < 1300	50	50	52
$ 1300-2600	29	30	27
$ 2600-5300	13	14	10
$ 5300 to 7900	4	4	5
$ 7900 to 10600	2	1	3
$ > 10600	2	1	3
Job category, n (%)				0.6824
Jobless	21	21	23
Private sector	18	18	16
Government sector	43	42	45
Self employs	18	19	16
Education level, n (%)				0.0403
Illiterate	42	42	40
Secondary school	38	37	40
Post graduate	16	18	12
Master	3	2	7
PhD	1	1	1
Indication for CAG, n (%)				0.1483
Elective	48	48	47
NSTEACS	46	44	50
STEMI	6	8	3
Findings on CAG, n (%)				< 0.001
No CAD	28	29	27
Single vessel	24	25	21
Double vessel	26	29	19
Triple vessel	22	17	34
Multi-vessel	48	46	53	0.1020
Left main	12	10	17	0.0175
Intervention, n (%)				< 0.0001
Medical therapy	36	33	43
PCI	47	54	31
CABG	17	13	26

DM: Diabetes mellitus; CAD: Coronary artery disease; CHF: Congestive heart failure; CVA: Cerebrovascular accident; CKD: Chronic kidney disease; PAD: Peripheral arterial disease; $: United States dollars; PhD: A doctor of philosophy; STEMI: ST segment elevation myocardial infarction; NSTEACS: Non–ST-segment elevation acute coronary syndromes; CAG: Coronary angiography; PCI: Percutaneous coronary intervention; CABG: Coronary artery bypass grafting.