Agriculture & Biology
smoking (food products)
100%
New England region
96%
food frequency questionnaires
82%
demography
60%
diet recall
27%
marital status
27%
health surveys
27%
household surveys
25%
analysis of covariance
23%
gender
22%
cigarettes
22%
health promotion
20%
folic acid
20%
caffeine
20%
blood lipids
19%
diet
19%
vitamin A
19%
blood pressure
18%
human resources
18%
interviews
18%
exercise
17%
income
16%
dietary fiber
15%
alcohols
15%
blood serum
15%
ascorbic acid
15%
vegetables
14%
iron
13%
protocols
13%
energy
11%
fruits
11%
lipids
10%
sampling
6%
Medicine & Life Sciences
New England
97%
Non-Smokers
76%
Smokers
63%
Smoking
31%
Food
22%
Demography
20%
Dietary Iron
15%
Diet
14%
Dietary Fiber
13%
Vitamin A
11%
Caffeine
11%
Ascorbic Acid
10%
Vegetables
10%
Folic Acid
10%
Health Promotion
10%
Health Surveys
10%
Fruit
10%
Tobacco Products
10%
Income
8%
Fats
8%
Alcohols
8%
Occupational Groups
7%
Interviews
7%
Lipids
7%
Exercise
6%
Blood Pressure
6%
Weights and Measures
6%
Serum
4%