Table 1. Baseline Characteristics of the Participants Before and After Propensity Score Matching.
| Variables | Participants, No (%) | |||||
|---|---|---|---|---|---|---|
| Before matching | After matching | |||||
| Statin group (N = 1571) | Non–statin group (N = 3534) | Standardized mean difference | Statin group (N = 1310) | Non–statin group (N = 1310) | Standardized mean difference | |
| Age, mean (SD), y | 64.2 (8.8) | 59.3 (9.8) | 0.53 | 64.6 (8.9) | 61.9 (9.5) | 0.29 |
| Men | 1182 (75.2) | 2660 (75.3) | −0.002 | 992 (75.7) | 989 (75.5) | 0.005 |
| Women | 389 (24.8) | 874 (24.7) | 0.002 | 318 (24.3) | 321 (24.5) | −0.005 |
| BMI, mean (SD) | 26.5 (3.2) | 26.3 (3.4) | 0.07 | 26.5 (3.2) | 26.6 (3.4) | −0.03 |
| MAP, mean (SD), mm Hg | 105.2 (13.2) | 104.8 (14.0) | 0.03 | 104.8 (13.3) | 107.4 (14.5) | −0.19 |
| FBG, mean (SD), mg/dL | 117.1 (45.0) | 124.3 (52.3) | −0.15 | 117.1 (46.8) | 126.1 (52.3) | −0.19 |
| Triglyceride, mean (SD), mg/dL | 194.7 (141.6) | 185.8 (159.3) | 0.02 | 194.7 (150.4) | 194.7 (168.1) | −0.02 |
| LDL-C, mean (SD), mg/dL | 92.7 (50.2) | 96.5 (38.6) | −0.09 | 92.7 (42.5) | 96.5 (42.5) | −0.08 |
| HDL-C, mean (SD), mg/dL | 57.9 (15.4) | 54.1 (15.4) | 0.02 | 57.1 (15.4) | 56.4 (15.4) | 0.05 |
| Heart rate, mean (SD), bpm | 73.9 (11.1) | 74.9 (10.6) | −0.09 | 73.7 (11.1) | 74.8 (10.5) | −0.10 |
| Elevated hs-CRP (≥0.1 mg/dL) | 1019 (64.9) | 2159 (61.1) | 0.08 | 845 (64.5) | 852 (65.0) | −0.01 |
| High school or higher | 420 (26.7) | 929 (26.3) | 0.01 | 343 (26.2) | 381 (29.1) | −0.07 |
| Light salta | 166 (10.6) | 389 (11.0) | −0.01 | 135 (10.3) | 148 (11.3) | −0.03 |
| Current smoker | 551 (35.1) | 1244 (35.2) | −0.003 | 465 (35.5) | 438 (33.4) | 0.04 |
| Alcohol drinking | 246 (15.7) | 593 (16.8) | −0.03 | 198 (15.1) | 219 (16.7) | −0.04 |
| Physically activeb | 316 (20.1) | 607 (17.2) | 0.08 | 265 (20.2) | 250 (19.1) | 0.03 |
| Atherosclerotic risk factors | ||||||
| Hypertension | 1480 (94.2) | 2556 (72.3) | 0.61 | 1219 (93.1) | 1215 (92.8) | 0.01 |
| Diabetes | 723 (46.0) | 1433 (40.6) | 0.11 | 605 (46.2) | 652 (49.8) | −0.07 |
| Dyslipidemia | 790 (50.3) | 1758 (49.8) | 0.01 | 659 (50.3) | 654 (49.9) | 0.01 |
| Metabolic syndrome | 691 (44.0) | 1400 (39.6) | 0.09 | 558 (42.6) | 623 (47.6) | −0.10 |
| Obesity | 498 (31.7) | 1049 (29.7) | 0.04 | 415 (31.7) | 413 (31.5) | 0.003 |
| Concurrent drug treatment | ||||||
| Antihypertensive drug | 1395 (88.8) | 1135 (32.1) | 1.42 | 1134 (86.6) | 1132 (86.4) | 0.004 |
| Antidiabetic drug | 634 (40.4) | 1014 (28.7) | 0.25 | 534 (40.8) | 580 (44.3) | −0.07 |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); bpm, beats per minute; FBG, fasting blood glucose; HDL-C, high density lipoprotein cholesterol; hs-CRP, high-sensitivity C-reactive protein; LDL-C, low-density lipoprotein cholesterol; MAP, mean arterial pressure.
SI conversion factor: to convert FBG to millimoles per liter, multiply by 0.0555; triglyceride to millimoles per liter, multiply by 0.0113; hs-CRP to milligrams per liter, multiply by 10; LDL-C and HDL-C to millimoles per liter, multiply by 0.0259.
A light salt was defined as less than 6 g/d according to the standard salt spoon in China.
Being physically active was defined as moderate or vigorous physical activity for at least 80 minutes per week.