Table 1.
Characteristics of study participants at baseline in the China Health and Retirement Longitudinal Study (CHARLS), 2011
| Baseline characteristics | All participants, N (%) or mean±SD | Classifications of each lipid parameter, N (%) | |||
| TC | 190.98 (167.40–215.34)* | Normal (<200 mg/dL) | Borderline high (200–240 mg/dL) | Hypercholesterolaemia (≥240 mg/d) | |
| N (%) | 7329 (100) | 4431 (60.46) | 2079 (28.37) | 819 (11.17) | |
| TG | 104.43 (74.34–152.22)* | Normal (<150 mg/dL) | Borderline high (150–200 mg/dL) | Hypertriglyceridaemia (≥200 mg/dL) | |
| N (%) | 7329 (100) | 5445 (74.29) | 883 (12.05) | 1001 (13.66) | |
| LDL-C | 114.43 (93.17–136.86)* | Normal (<130 mg/dL) | Borderline high (130–160 mg/dL) | Elevated LDL-C (≥160 mg/dL) | |
| N (%) | 7329 (100) | 5010 (68.36) | 1528 (21.12) | 771 (10.52) | |
| HDL-C | 49.87 (40.59–60.31)* | Normal (≥40 mg/dL) | Low HDL-C (<40 mg/dL) | ||
| N (%) | 7329 (100) | 5625 (76.75) | 1704 (23.25) | ||
| Characteristics based on classifications of total cholesterol | P | ||||
| Age (years) | 58.77±9.40 | 58.40±9.57 | 59.25±9.16 | 59.66±8.84 | <0.001 |
| BMI (kg/m2) | 23.40±3.72 | 23.18±3.64 | 23.65±3.81 | 24.09±3.84 | <0.001 |
| Waist circumference (cm) | 83.93±12.28 | 83.15±12.31 | 85.02±11.76 | 85.52±13.03 | <0.001 |
| SBP (mm Hg) | 129.51±21.22 | 128.15±20.99 | 130.84±21.55 | 133.69±20.92 | <0.001 |
| DBP (mm Hg) | 75.41±12.11 | 74.66±12.09 | 76.17±12.02 | 77.63±12.13 | <0.001 |
| C reactive protein (mg/L) | 0.99 (0.54–2.09)* | 0.92 (0.51–2.06)* | 1.04 (0.56–1.99)* | 1.18 (0.65–2.36)* | <0.001 |
| Plasma glucose (mg/dL) | 102.24 (94.32–112.68)* | 100.8 (93.42–110.70)* | 103.5 (95.22–113.94)* | 106.20 (97.20–120.24)* | 0.004 |
| Gender, n (%) | <0.001 | ||||
| Male | 3455 (47.14) | 2292 (51.73) | 880 (42.33) | 283 (34.55) | |
| Female | 3874 (52.86) | 2139 (48.27) | 1199 (57.67) | 536 (65.45) | |
| Education level, n (%) | <0.001 | ||||
| Illiterate | 2163 (29.51) | 1384 (31.23) | 583 (28.04) | 196 (23.93) | |
| Primary or above | 5166 (70.49) | 3047 (68.77) | 1496 (71.96) | 623 (76.07) | |
| Marital Status, n (%) | 0.003 | ||||
| Married/cohabitation | 6499 (88.68) | 3938 (88.87) | 1858 (89.37) | 703 (85.84) | |
| Single/divorced | 830 (11.32) | 493 (11.13) | 221 (10.63) | 116 (14.16) | |
| Cigarette smoking, n (%) | <0.001 | ||||
| Never smoke | 4473 (61.03) | 2572 (58.05) | 1241 (64.50) | 560 (68.38) | |
| Used to smoke | 593 (8.09) | 338 (7.63) | 186 (8.95) | 69 (8.42) | |
| Still have | 2263 (30.88) | 1521 (34.33) | 552 (26.55) | 190 (23.20) | |
| Alcohol drinking, n (%) | 0.021 | ||||
| Never drink | 4848 (66.15) | 2916 (65.81) | 1358 (65.32) | 574 (70.09) | |
| Used to drinking | 576 (7.86) | 387 (8.73) | 144 (6.93) | 45 (5.49) | |
| Still have | 1905 (25.99) | 1128 (25.46) | 577 (27.75) | 200 (24.42) | |
*Variables are presented as median (IQR).
BMI, body mass index; DBP, diastolic blood pressure; HDL-C, high density lipoprotein cholesterol; LDL-C, low density lipoprotein cholesterol; SBP, systolic blood pressure; TC, total cholesterol; TG, triglyceride.