Secular trends in the prevalence of low risk factor burden for cardiovascular disease according to obesity status among Chinese adults, 1993–2009

Table 1 Trends in prevalence of low risk profile and its components by waist circumference (WC) status*

		1993	1997	2000	2004	2006	2009	Δ^†	P for trend^‡	P^§
Men	The simultaneous presence of 4 health metrics^‖ (%)
	WC < 90 cm	17.5	16.4	16.9	14.5	16.5	15.0	-2.5	<0.001	0.64
	WC ≥90 cm	4.2	4.7	3.7	5.1	3.4	2.0	-2.2	0.004	0.64
	Not currently smoking (%)
	WC < 90 cm	37.7	40.9	42.6	43.4	45.7	43.8	6.1	<0.001	0.18
	WC ≥90 cm	42.9	46.5	50.1	52.0	50.7	50.6	7.7	0.140	0.18
	Body mass index <25 kg/m² (%)
	WC < 90 cm	92.8	92.5	90.1	87.8	87.8	89.0	-3.8	0.0151	0.39
	WC ≥90 cm	44.6	28.7	32.7	35.7	28.4	26.8	-17.8	<0.001	0.39
	Untreated systolic/diastolic blood pressure <120/80 mmHg (%)
	WC < 90 cm	50.0	42.1	41.2	37.3	38.6	37.2	-12.8	<0.001	0.32
	WC ≥90 cm	23.2	19.1	18.0	16.5	19.1	17.8	-5.4	0.006	0.32
	Not having been previously diagnosed with diabetes (%)
	WC < 90 cm	100.0	99.7	99.6	99.3	98.8	98.7	-1.3	<0.001	0.92
	WC ≥90 cm	99.9	99.0	99.1	97.9	97.3	96.3	-3.6	<0.001	0.92
Women	The simultaneous presence of 4 health metrics^‖ (%)
	WC < 80 cm	60.9	53.3	54.8	52.3	55.1	55.0	-5.9	<0.001	0.06
	WC ≥80 cm	30.7	24.0	25.0	24.8	25.2	25.6	-5.1	<0.001	0.06
	Not currently smoking (%)
	WC < 80 cm	95.7	95.7	96.4	96.9	97.2	97.6	1.9	0.0209	0.94
	WC ≥80 cm	95.8	95.6	95.5	96.8	97.6	97.6	1.8	<0.001	0.94
	Body mass index <25 kg/m² (%)
	WC <80 cm	95.0	94.9	93.8	94.4	94.0	95.7	0.7	0.158	0.45
	WC ≥80 cm	59.4	54.6	52.7	51.4	53.9	55.0	-4.4	0.0126	0.45
	Untreated systolic/diastolic blood pressure <120/80 mmHg (%)
	WC < 80 cm	65.1	57.5	59.2	56.2	58.9	57.8	-7.3	<0.001	0.21
	WC ≥80 cm	47.6	40.1	42.0	43.0	40.1	39.2	-8.4	<0.001	0.21
	Not having been previously diagnosed with diabetes (%)
	WC < 80 cm	100.0	99.5	99.5	99.3	99.4	99.1	-0.9	<0.001	0.95
	WC ≥80 cm	100.0	99.2	98.8	98.7	98.1	98.0	-2.0	<0.001	0.95

*Estimates are weighted to be representative of the Chinese population aged 18 to 118 years.
^†The sixth survey-the first survey (2009–1993);
^‡Trends in prevalence of low risk profile and its components from 1993 to 2009 were assessed by Cochran–Armitage trend testing;
^§P for survey * WC interaction terms comparing the first and sixth surveys;
^‖The simultaneous presence of not currently smoking, BMI <25 kg/m², untreated systolic/diastolic BP < 120/80 mmHg, and not having been previously diagnosed with diabetes.

ISSN: 1471-2458