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Table 1 Basic characteristics of CHD patients and controls

From: The effect of CYP7B1 polymorphisms on the risk of coronary heart disease in Hainan Han population

Characteristics Cases (n = 508) Controls (n = 510) p
Age, years (mean ± SD)a 62.17 ± 10.34 61.12 ± 9.02 0.084
 > 60 282 (55.5%) 284 (55.7%)  
 ≤ 60 226 (45.5%) 226 (44.3%)  
Gender b    0.964
Male 334 (65.7%) 336 (65.9%)  
Female 174 (34.3%) 174 (34.1%)  
Urea (mmol/l)c 462.01 ± 4.50 456.63 ± 2.67 0.759
Creatinine (umol/l)c 384.73 ± 3.40 456.07 ± 3.50  < 0.001
Uric acid (umol/l)c 431.26 ± 1.08 489.10 ± 2.07  < 0.001
Total-cholesterol (mmol/l)c 369.60 ± 1.00 548.04 ± 1.05  < 0.001
Apolipoprotein AI (g/l)c 247.13 ± 5.74 351.08 ± 0.70  < 0.001
Smoking status    
Smoker 231 (45.5%) 115 (22.5%)  
Nonsmoker 186 (36.6%) 167 (32.7%)  
Missing 91 (17.9%) 228 (44.8%)  
Drinking status    
Drinking 52 (10.2%) 124 (24.3%)  
Nondrinking 306 (60.2%) 135 (26.5%)  
Missing 150 (29.6%) 251 (49.2%)  
Diabetes 190 (37.4%)   
Non diabetes 318 (62.6%)   
Hypertension 362 (71.3%)   
Normal tension 146 (28.7%)   
  1. pa value was calculated by Student ′s t-test. pb value was calculated by Pearson ′s χ2 test
  2. pc Mann–whitney test is used