From: Plasma homocysteine levels associated with a corrected QT interval
Variables | QTc ≤0.44 s (n = 4695) | QTc > 0.44 s (n = 2307) | P-value |
---|---|---|---|
Age (year) | 53 ± 10 | 56 ± 11 | <0.001 |
Male gender | 2589 (55.1) | 671 (29.1) | <0.001 |
Race of Han | 4394 (93.6) | 2178 (94.4) | 0.179 |
Smoking | 1905 (40.6) | 732 (31.7) | <0.001 |
Drinking | 1250 (26.6) | 355 (15.4) | <0.001 |
Sleep duration (h/d) | 7.5 ± 1.7 | 7.4 ± 1.7 | 0.029 |
Diet score | 2.3 ± 1.2 | 2.1 ± 1.1 | <0.001 |
Education | <0.001 | ||
Primary school or below | 2162 (46.0) | 1265 (54.8) | |
Middle school | 2082 (44.3) | 851 (36.9) | |
High school or above | 451 (9.6) | 191 (8.3) | |
Physical activity | <0.001 | ||
Low | 969 (20.6) | 693 (30.0) | |
Moderate | 3423 (72.9) | 1476 (64.0) | |
High | 303 (6.5) | 138 (6.0) | |
Family income (CNY/year) | <0.001 | ||
≤ 5000 | 778 (16.6) | 465 (20.2) | |
5000–20,000 | 2664 (56.7) | 1293 (56.0) | |
> 20,000 | 1253 (26.7) | 549 (23.8) | |
BMI(kg/m2) | 24.6 ± 3.7 | 25.2 ± 3.8 | <0.001 |
WC (cm) | 83.1 ± 9.8 | 84.5 ± 9.8 | <0.001 |
SBP (mmHg) | 139.9 ± 23.3 | 149.6 ± 26.3 | <0.001 |
DBP(mmHg) | 80.6 ± 11.2 | 84.3 ± 12.8 | <0.001 |
FPG (mmol/L) | 5.7 ± 1.4 | 6.1 ± 2.1 | <0.001 |
TC (mmol/L) | 5.0 ± 1.0 | 5.2 ± 1.1 | <0.001 |
TG (mmol/L) | 1.6 ± 1.5 | 1.9 ± 1.8 | <0.001 |
LDL-C (mmol/L) | 2.8 ± 0.7 | 2.9 ± 0.8 | <0.001 |
HDL-C (mmol/L) | 1.4 ± 0.4 | 1.4 ± 0.4 | 0.361 |
Serum calcium (mmol/L) | 2.4 ± 0.1 | 2.4 ± 0.1 | 0.461 |
Serum potassium (mmol/L) | 4.2 ± 0.3 | 4.1 ± 0.3 | <0.001 |
Serum magnesium (mmol/L) | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.057 |
History of heart diseasea | 383 (8.2) | 294 (12.7) | <0.001 |
Medication usedb | 2390 (50.9) | 1439 (62.4) | <0.001 |