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Table 1 Comparison of general characteristics between control and obesity groups

From: The MC4R SNPs, their haplotypes and gene-environment interactions on the risk of obesity

Parameter Control Obesity t (x2) P
Number 978 858   
Age (years)a 55.38 ± 15.33 56.29 ± 14.25 −1.323 0.186
Body mass index (kgm2) 20.01 ± 1.48 27.62 ± 3.07 −66.13 <  0.001
Waist circumference (cm) 71.51 ± 6.487 87.52 ± 8.14 −46.264 <  0.001
Systolic blood pressure (mmHg) 131.49 ± 23.28 137.83 ± 22.79 −5.88 <  0.001
Diastolic blood pressure (mmHg) 80.64 ± 12.36 85.57 ± 13.67 −8.063 <  0.001
Glucose (mmol/L) 6.17 ± 1.37 6.24 ± 1.32 −1.283 0.200
TC (mmol/L) 4.89 ± 0.98 5.09 ± 0.93 −4.607 <  0.001
TG (mmol/L)b 1.17 (0.93) 1.63 (1.22) −14.095 <  0.001
HDL-C (mmol/L) 1.30 ± 0.29 1.25 ± 0.26 3.792 <  0.001
LDL-C (mmol/L) 3.10 ± 0.45 3.18 ± 0.50 −3.695 <  0.001
Male/femalec 450/528 395/463 0.000 0.991
Smoking status [n (%)]
 Non-smoker 772 (78.9) 637 (74.2)   
 Smoker 206 (21.1) 221 (25.8) 5.643 0.018
Alcohol consumption [n (%)]
 Non-drinker 795 (81.3) 686 (80.0)   
 Drinker 183 (18.7) 172 (20.0) 0.522 0.470
  1. TC Total cholesterol, TG Triglyceride, LDL-C Low-density lipoprotein cholesterol, HDL-C High-density lipoprotein cholesterol
  2. aMean ± SD was detected by t-test
  3. bBecause of non-normal distribution, triglyceride value was presented as median (interquartile range), the discrepancy between the two groups was detected by the Wilcoxon-Mann-Whitney test
  4. cDifference of classified Data was determined as Chi-square test