Table 1 Characteristics of cases and controls a
From: Cardiovascular disease and arsenic exposure in Inner Mongolia, China: a case control study
|  | Control (N = 275) | Case (N = 298) | Total (N = 573) |
|---|---|---|---|
N(%) | N(%) | N(%) | |
Sex | Â | Â | Â |
  Male | 185 (67%) | 209 (70%) | 394 (69%) |
  Female | 90 (33%) | 89 (30%) | 179 (31%) |
Age | Â | Â | Â |
  21-40 | 23 (8%) | 21 (7%) | 44 (8%) |
  41-50 | 59 (22%) | 49 (16%) | 108 (19%) |
  51-60 | 104 (38%) | 91 (31%) | 195 (34%) |
  61-70 | 89 (32%) | 137 (46%) | 226 (39%) |
Occupation | Â | Â | Â |
Unemployed | 41 (15%) | 19 (7%) | 60 (11%) |
Farming | 116 (42%) | 185 (64%) | 301 (54%) |
Industry | 19 (7%) | 23 (8%) | 42 (8%) |
Professional | 49 (18%) | 41 (14%) | 90 (16%) |
Other | 50 (18%) | 20 (7%) | 70 (12%) |
Smoking | Â | Â | Â |
Never Smoker | 134 (49%) | 86 (30%) | 220 (39%) |
Former Smoker | 25 (9%) | 91 (31%) | 116 (21%) |
Current Smoker | 115 (42%) | 115 (39%) | 230 (41%) |
Drinks Alcohol | Â | Â | Â |
No | 164 (60%) | 158 (54%) | 322 (57%) |
Yes | 111 (40%) | 135 (46%) | 246 (43%) |
Family history of cardiovascular disease | Â | Â | Â |
No | 227 (83%) | 141 (48%) | 368 (65%) |
Yes | 48 (18%) | 152 (52%) | 200 (35%) |
Education | Â | Â | Â |
None or some primary school | 65 (24%) | 97 (33%) | 162 (29%) |
Some high school | 125 (46%) | 139 (48%) | 142 (25% |
Completed high school | 85 (31%) | 57 (20%) | 142 (25%) |
Body Mass Index (quartiles) | Â | Â | Â |
  15.7-22.2 | 78 (28%) | 65 (22%) | 143 (25%) |
  22.3-24.1 | 76 (28%) | 69 (23%) | 145 (25%) |
  24.2-25.9 | 78 (28%) | 76 (26%) | 154 (27%) |
  26.0-36.5 | 43 (16%) | 88 (30%) | 131 (23%) |
Years using at current residence (mean) | 17.1 | 18.3 | 17.8 |
Estimated monthly servings (mean) | Â | Â | Â |
Fruits and vegetables | 16.7 | 14.3 | 15.4 |
Meat | 20.3 | 21.8 | 21.1 |
(beef, pork, poultry) | |||
Other protein | 15.8 | 12.6 | 14.1 |
(beans, milk, eggs) |