Effect of BMI and Its Optimal Cut-Off Value in Identifying Hypertension in Uyghur and Han Chinese: A Biethnic Study from the China National Health Survey (CNHS)

Table 1

Demographic and clinical characteristics of Uyghur and Han adults of China, 2013.

	Uyghur (n=2928)				Han (n=3097)
	Male (n=1028)		Female (n=1900)		Male (n=1255)		Female (n=1842)
Age, years (mean, SD)	46.3	14.33	43.25^a	11.69	47.71^d	13.66	47.73^c	12.45
Educational attainment (n, %)
Illiterate	33	3.27	42	2.24	45	3.63^c	195	10.66^ac
Elementary school	215	21.31	411	21.94	135	10.89	274	14.97
Junior high school	241	23.89	469	25.04	386	31.13	502	27.43
Senior high school	241	23.89	420	22.42	289	23.31	378	20.66
College or higher	279	27.65	531	28.35	385	31.05	481	26.28
Residential areas (n, %)
Urban	519	51.18	877	46.62^b	800	64.41^c	1150	62.77^c
Rural	495	48.82	1004	53.38	442	35.59	682	37.23
BMI, kg/m^2 (n, %)
<25	454	44.42	841	44.29^a	612	48.84^d	1122	60.91^ac
≥25	457	44.72	706	37.18	531	42.38	581	31.54
≥30	111	10.86	352	18.54	110	8.78	139	7.55
Cigarette smoking (n, %)
Ever smoking	711	70.19	3	0.16^a	906	73.01	34	1.85^ac
Never smoking	302	29.81	1881	99.84	335	26.99	1799	98.15
Alcohol drink (n, %)
Quit drink	252	25.07	4	0.21^a	137	11.16^c	36	1.97^ac
Regular drink	71	7.06	1	0.05	295	24.02	33	1.81
Occasional drink	267	26.57	7	0.37	560	45.60	413	22.64
Never drink	415	41.29	1873	99.36	236	19.22	1342	73.57
Physical activity (n, %)
Low	174	17.58	620	34.75^a	166	13.46^c	401	22.09^ac
Moderate	648	65.45	1002	56.17	825	66.91	1218	67.11
High	168	16.97	162	9.08	242	19.63	196	10.80
FPG, mmol/L (mean, SD)	5.30	1.72	5.12^a	1.48	5.30	1.57	5.20	1.38
TC, mmol/L (mean, SD)	4.87	1.08	4.76^b	1.02	4.69^c	0.94	4.81^a	1.00
TG, mmol/L (mean, SD)	2.03	2.05	1.4^a	1.06	2.02	2.12	1.49^ad	1.23
LDL-C, mmol/L (mean, SD)	2.98	0.79	2.89^a	0.82	2.75^c	0.74	2.77^c	0.78
HDL-C, mmol/L (mean, SD)	1.26	0.25	1.42^a	0.26	1.34^c	0.28	1.52^ac	0.30
SBP, mmHg (mean, SD)	123.33	15.71	117.06^a	18.29	124.30	14.92	117.22^a	17.06
DBP, mmHg (mean, SD)	73.89	11.16	72.12	11.80	76.84^c	11.04	71.95^a	10.35
Hypertension (n, %)	219	21.53	321	17.05^a	344	27.79^c	388	21.19^ac

Values are presented as mean and SD for continuous data or number and percentage (%) for categorized data.
a: comparison between male and female in the same ethnic group, P<0.01; b: comparison between male and female in the same ethnic group, P<0.05; c: comparison between Uyghur and Han in the same sex group, P<0.01; d: comparison between Uyghur and Han in the same sex group, P<0.05. Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared.); FPG: fasting plasma glucose; SBP: systolic blood pressure; DBP: diastolic blood pressure; TC, triglyceride; TC, total cholesterol, HDL-C, high density lipoprotein cholesterol; and LDL-C: low-density lipoprotein cholesterol.