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Table 1 Baseline characteristics of the study population according to SUA quartiles

From: Mediation of the effect of serum uric acid on the risk of developing hypertension: a population-based cohort study

Characteristics SUA quartiles (mg/dL)
Total < 3.50 3.50–4.20 4.30–5.00 > 5.00 P value
Age (years) 58.1 (9.4) 56.5 (9.0) 57.6 (9.3) 58.5 (9.3) 59.6 (9.8) < 0.001
Male 3546 (46.4) 351 (19.6) 702 (36.2) 1012 (54.1) 1481 (72.8) < 0.001
Education level < 0.001
 Primary 2165 (28.3) 645 (36.0) 615 (31.7) 471 (25.2) 434 (21.3)  
 Secondary 3131 (41.0) 686 (38.2) 759 (39.1) 762 (40.7) 924 (45.4)  
 Higher 2343 (30.7) 463 (25.8) 565 (29.1) 639 (34.1) 676 (33.2)  
Marital status 0.576
 Married 6832 (89.4) 1610 (89.7) 1725 (89.0) 1680 (89.7) 1817 (89.3)  
 Divorced 86 (1.1) 19 (1.1) 16 (0.8) 23 (1.2) 28 (1.4)  
 Widowed 721 (9.4) 165 (9.2) 198 (10.2) 169 (9.0) 189 (9.3)  
Cigarette smoking < 0.001
 Never 4637 (60.7) 1411 (78.7) 1324 (68.3) 1042 (55.7) 860 (42.3)  
 Current 2424 (31.7) 315 (17.6) 511 (26.4) 680 (36.3) 918 (45.1)  
 Former 578 (7.6) 68 (3.8) 104 (5.4) 150 (8.0) 256 (12.6)  
Alcohol intaking < 0.001
 Never 5169 (67.7) 1453 (81.0) 1398 (72.1) 1212 (64.7) 1106 (54.4)  
 Light 893 (11.7) 159 (8.9) 226 (11.7) 260 (13.9) 248 (12.2)  
 Moderate 373 (4.9) 51 (2.8) 89 (4.6) 95 (5.1) 138 (6.8)  
 High 1204 (15.8) 131 (7.3) 226 (11.7) 305 (16.3) 542 (26.6)  
Disability 1849 (24.2) 469 (26.1) 469 (24.2) 464 (24.8) 447 (22.0) 0.023
Depressive symptoms 2757 (36.1) 768 (42.8) 727 (37.5) 641 (34.2) 621 (30.5) < 0.001
Sleep duration (h) 6.5 (1.8) 6.5 (1.8) 6.4 (1.7) 6.5 (1.7) 6.5 (1.8) 0.566
Grip strength (kg) 29.7 (10.0) 26.4 (8.8) 28.4 (9.6) 30.7 (9.9) 33.0 (10.4) 0.229
SBP (mmHg) 126.0 (18.9) 123.7 (18.6) 125.0 (18.7) 125.8 (18.7) 129.1 (19.1) < 0.001
DBP (mmHg) 73.9 (11.2) 72.8 (10.8) 73.3 (10.9) 73.9 (11.4) 75.6 (11.9) < 0.001
BMI (kg/m2) 23.0 (3.4) 22.7 (8.8) 23.0 (3.4) 23.2 (3.4) 23.2 (3.5) < 0.001
WC (cm) 84.2 (9.6) 82.5 (9.1) 83.8 (9.4) 84.8 (9.7) 85.6 (9.9) < 0.001
PR (times/min) 72.5 (10.3) 72.4 (9.9) 72.3 (10.1) 72.5 (10.2) 72.9 (10.8) < 0.001
HbA1c (%) 5.23 (0.8) 5.27 (1.0) 5.20 (0.7) 5.23 (0.7) 5.21 (0.6) 0.048
FPG (mg/dL) 108.1 (32.4) 108.7 (39.3) 107.6 (32.8) 107.2 (28.7) 109.1 (28.1) 0.207
TC (mg/dL) 191.8 (38.3) 187.7 (36.1) 191.8 (37.6) 191.8 (38.0) 195.4 (40.6) < 0.001
TG (mg/dL) 127.1 (99.6) 111.8 (72.9) 120.3 (88.2) 127.8 (93.1) 146.5 (128.6) < 0.001
HDL-C (mg/dL) 52.0 (15.3) 53.9 (14.5) 52.8 (14.3) 51.3 (15.6) 50.3 (16.4) < 0.001
LDL-C (mg/dL) 115.2 (34.3) 113.4 (32.5) 116.4 (33.7) 115.6 (33.5) 115.2 (37.2) 0.065
CRE (mg/dL) 0.76 (0.19) 0.65 (0.13) 0.72 (0.14) 0.78 (0.16) 0.89 (0.25) < 0.001
BUN (mg/dL) 15.6 (4.5) 14.5 (4.0) 15.3 (4.3) 15.9 (4.3) 16.8 (4.9) < 0.001
CRP (mg/L) 2.47 (7.1) 2.31 (7.2) 2.40 (7.4) 2.47 (7.0) 2.66 (6.8) 0.462