Table 2.
Demographic, anthropometric and plasma biochemical characteristics of subjects at baseline
| Characteristics | Female (n = 1245) | Male (n = 1241) | P value |
|---|---|---|---|
| Age (years) | 66.49 ± 5.50 | 67.12 ± 5.89 | 0.006 |
| Age | 0.016 | ||
| 60–70 | 957(76.9) | 892(71.9) | |
| 70–80 | 255(20.5) | 306(24.7) | |
| ≥80 | 33(2.7) | 43(3.5) | |
| Ethnicity | 0.049 | ||
| Han | 1182(94.9) | 1196(96.4) | |
| Others a | 63(5.1) | 45(3.6) | |
| Education status | < 0.001 | ||
| Primary school or below | 1066(85.6) | 801(64.5) | |
| Middle school | 152(12.2) | 359(28.9) | |
| High school or above | 27(2.2) | 81(6.5) | |
| Marriage status | < 0.001 | ||
| Married | 974(78.3) | 1060(85.5) | |
| Single or divorced | 2(0.2) | 26(2.1) | |
| Widowed | 268(21.5) | 154(12.4) | |
| Physical activity | < 0.001 | ||
| Light | 794(64.6) | 617(50.2) | |
| Moderate | 202(16.4) | 203(16.5) | |
| Severe | 233(19.0) | 410(33.3) | |
| Annual income (CNY/year) | 0.380 | ||
| ≤ 5000 | 296(23.8) | 282(22.7) | |
| 5000–20,000 | 703(56.6) | 687(55.4) | |
| > 20,000 | 244(19.6) | 271(21.9) | |
| Current smoking status | 298(23.9) | 622(50.1) | < 0.001 |
| Current drinking status | 56(4.5) | 491(39.6) | < 0.001 |
| Family history of stroke | 213(17.1) | 195(15.7) | 0.188 |
| Family history of coronary heart disease | 163(13.1) | 98(7.9) | < 0.001 |
| Family history of hypertension | 246(19.8) | 200(16.1) | 0.010 |
| Antihypertension medication in 2 weeks | 301(35.08) | 219(25.26) | < 0.001 |
| Antidiabetic medication in 2 weeks | 77(36.67) | 33(22.45) | < 0.001 |
| Antidyslipidemic medication in 2 weeks | 49(4.43) | 26(3.07) | 0.654 |
| BMI (kg/m2) | 24.53 ± 3.91 | 24.10 ± 3.39 | 0.004 |
| SBP (mmHg) | 151.08 ± 24.56 | 152.08 ± 23.24 | 0.296 |
| DBP (mmHg) | 80.62 ± 11.84 | 83.42 ± 11.34 | < 0.001 |
| WC (cm) | 82.13 ± 10.32 | 82.91 ± 9.57 | 0.053 |
| WC (cm) (NCEP ATP III and AHA/NHLBI)b | 353(28.7) | 33(2.7) | < 0.001 |
| WC (cm) (IDF)c | 726(59.0) | 306(25.0) | < 0.001 |
| TC (mmol/L) | 5.70 ± 1.09 | 5.17 ± 1.03 | < 0.001 |
| TG (mmol/L) | 1.77 ± 1.24 | 1.38 ± 1.16 | < 0.001 |
| LDL-C(mmol/L) | 3.27 ± 0.85 | 2.90 ± 0.81 | < 0.001 |
| HDL-C (mmol/L) | 1.44 ± 0.37 | 1.44 ± 0.45 | 0.898 |
| FPG (mmol/L) | 6.15 ± 1.97 | 5.97 ± 1.60 | 0.015 |
| FPG (mmol/L) (NCEP ATP III)d | 382(30.9) | 333(27.1) | 0.021 |
| FPG (mmol/L) (AHA/NHLBI and IDF)e | 671(54.2) | 654 (53.2) | 0.311 |
aIncluding some ethnic minorities in China, such as Mongol and Manchu.
b Waist circumference ≥ 102 cm in men and ≥ 88 cm in women.
c Waist circumference ≥ 90 cm in men and ≥ 80 cm in women.
d Fasting glucose level of ≥ 6.1 mmol/L.
e Fasting glucose level of ≥ 5.6 mmol/L.
BMI body mass index, WC waist circumference, CNY China Yuan (1CNY = 0.161 USD), SBP systolic blood pressure, DBP diastolic blood pressure, TG triglyceride, LDL-C low-density lipoprotein cholesterol, HDL-C high-density lipoprotein cholesterol, FPG fasting plasma glucose. AHA American Heart Association; IDF International Diabetes Federation; NCEP ATP III National Cholesterol Education Program Adult Treatment Panel III; NHLBI National Heart, Lung, and Blood Institute.