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Table 1 The baseline characteristics of participants by different levels of baseline serum uric acid

From: Temporal changes in serum uric acid and risk for metabolic syndrome: a longitudinal cohort study

  All (n = 44,176) Quintile of baseline serum uric acid P
  Q1 (n = 8655) Q2 (n = 8831) Q3 (n = 8954) Q4 (n = 8812) Q5 (n = 8924)
Age (year) 37 (30, 47) 36 (29, 44) 37 (29, 46) 37 (30, 48) 38 (30, 48) 38 (31, 48)  < 0.001
Gender         < 0.001
 Men 21,972 (49.7%) 488 (2.2%) 1579 (7.2%) 4450 (20.2%) 7006 (31.9%) 8449 (38.5%)  
 Women 22,204 (50.3%) 8167 (36.8%) 7252 (32.7%) 4504 (20.3%) 1806 (8.1%) 475 (2.1%)  
Smoking         < 0.001
 No 36,643 (82.9%) 8465 (23.1%) 8272 (22.6%) 7470 (20.4%) 6442 (17.6%) 5994 (16.3%)  
 Yes 7533 (17.1%) 190 (2.5%) 559 (7.4%) 1484 (19.7%) 2370 (31.5%) 2930 (38.9%)  
Drinking         < 0.001
 No 31,114 (70.4%) 7983 (25.6%) 7638 (24.5%) 6449 (20.7%) 4966 (16.1%) 4078 (13.1%)  
 Yes 13,062 (29.6%) 672 (5.1%) 1193 (9.1%) 2505 (19.2%) 3846 (29.4%) 4846 (37.2%)  
 SBP (mmHg) 116 (107, 124) 111 (103, 119) 112 (104, 121) 116 (107, 124) 118 (110, 127) 119 (113, 128)  < 0.001
 DBP (mmHg) 70 (63, 77) 66 (61, 73) 67 (61, 74) 70 (63, 77) 72 (66, 79) 73 (67, 80)  < 0.001
 BMI (kg/m2) 22.1 (20.3, 24.0) 20.7 (19.3, 22.2) 21.2 (19.6, 22.9) 22 (20.3, 23.7) 22.9 (21.1, 24.5) 23.8 (22.1, 25.2)  < 0.001
 TG (mmol/L) 1.04 (0.76, 1.44) 0.82 (0.64, 1.09) 0.89 (0.69, 1.19) 1.04 (0.78, 1.41) 1.17 (0.87, 1.57) 1.37 (1.02, 1.86)  < 0.001
 HDL-C (mmol/L) 1.39 (1.19, 1.62) 1.55 (1.35, 1.77) 1.5 (1.30, 1.73) 1.39 (1.20, 1.61) 1.3 (1.13, 1.50) 1.22 (1.08, 1.41)  < 0.001
 LDL-C (mmol/L) 2.65 (2.24, 3.15) 2.43 (2.04, 2.89) 2.56 (2.14, 3.01) 2.67 (2.26, 3.15) 2.78 (2.37, 3.26) 2.87 (2.48, 3.36)  < 0.001
 TC (mmol/L) 4.73 (4.20, 5.31) 4.56 (4.05, 5.14) 4.67 (4.14, 5.23) 4.74 (4.22, 5.31) 4.81 (4.27, 5.36) 4.86 (4.35, 5.47)  < 0.001
 FBG (mmol/L) 4.94 (4.68, 5.23) 4.93 (4.68, 5.19) 4.92 (4.67, 5.20) 4.94 (4.67, 5.23) 4.97 (4.70, 5.26) 4.96 (4.69, 5.24)  < 0.001
 SUA (μmol/L) 308 (255, 368) 219 (200, 232) 265 (254, 275) 307 (296, 317) 353 (341, 367) 420 (398, 450)  < 0.001
 SCr (μmol/L) 63 (53, 75) 52 (47, 57) 55 (50, 62) 63 (55, 73) 72 (63, 79) 76 (69, 82)  < 0.001
  1. Data are presented as median (interquartile range) values for continuous variables, percentage form (%) for categorical variables
  2. MetS metabolic syndrome, DBP diastolic blood pressure, SBP systolic blood pressure, BMI body mass index, TG triglycerides, HDL-C high-density lipoprotein cholesterol, LDL-C low-density lipoprotein cholesterol, TC total cholesterol, FBG fasting blood glucose, SUA serum uric acid, SCr serum creatinine
  3. P values were calculated using analysis of Kruskal–Wallis test and Chi-square test for continuous and categorical variables, respectively