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Table 1 Baseline characteristics of subjects according to obesity

From: Interactions with the MC4R rs17782313 variant, mental stress and energy intake and the risk of obesity in Genome Epidemiology Study

  Categories Normal (BMI < 23) Overweight (23 = <BMI < 25) Obesity (BMI > =25)
Age 30–45 966 (41.0) 579 (24.6) 813 (34.5)
45–65 2295 (43.0) 1124 (21.0) 1924 (36.0)
65+ 648 (56.8) 168 (14.7) 325 (18.5)***
Gender (male %) 1855 (44.4) 936 (20.1) 1669 (35.8)**
Income (USD/month) <1000 1644 (53.8) 516 (16.9) 896 (29.3)
1000 ~ 2000 1107 (24.8) 535 (21.2) 885 (35.0)
2000 ~ 4000 899 (36.8) 614 (25.2) 928 (28.0)
>4000 171 (26.0) 187 (28.4) 201 (45.7)***
Drinking (g/week) No 2407 (44.9) 1095 (20.4) 1863 (34.7)
Moderate (1 ~ 25 g) 917 (43.1) 488 (22.9) 725 (34.0)
Heavy (>25 g) 446 (41.2) 238 (22.0) 398 (36.8)*
Smoking Non 2216 (43.1) 1080 (21.0) 1847 (35.9)
Past 523 (38.6) 307 (22.7) 524 (38.7)
Current 1102 (49.5) 469 (21.1) 657 (29.5)***
Total activity Little 1537 (37.7) 943 (23.1) 1597 (39.2)
Moderate 831 (39.7) 496 (23.7) 767 (36.6)
Heavy 1354 (58.0) 388 (16.6) 591 (25.3)***
Stress A little 2652 (44.6) 1238 (20.8) 2058 (34.6)
Moderate 1109 (43.3) 574 (22.4) 877 (34.3)
Heavy 148 (44.3) 59 (17.7) 127 (38.0)
MC4R rs17782313 TT 2302 (59.0) 1389 (35.6) 214 (5.5)
CT 1039 (55.6) 711 (38.0) 119 (6.4)
CC 1692 (55.4) 1146 (37.5) 218 (7.1)**
  1. N (row %)
  2. *Significantly different in χ2 test at P < 0.05. ** P < 0.01. *** P < 0.001