Table 1 Field visits and details on questionnaires

Pre-visit

Screening

Household Form

Dwelling type, household members

Eligibility Screener

Date of birth, gender, language, religion, eligibility information (pregnant, heart attack < 12 months, cancer, hemophilia, willingness to provide blood sample), contact information

Non-response Form

Reasons for refusal

Visit 1

Questionnaires after signing consent form

Demographic

Education, mother tongue, marital status, cooking fuel, household appliances, income

Food Preparer

Household information on use of 19 spices, chilies (dried and green), coconut, garlic, onions, 13 cooking oils

Residential History

Time at current residence, reason for moving to current residence, contact information in case the participant moves

Physical Activity

Vigorous activity, moderate activity, walking, sitting during the past 7 days

Tobacco Use

Type of tobacco smoked/chewed, length of time using product, quantity used

Alcohol Use

Type of alcohol consumed, the length of time using the product, quantity consumed

Occupational History

Current occupation, five most recent occupations lasting 6 months or longer, time at each job.

Visit 2

Medical history Physical examination

Medical History

Information on health care provider, medical conditions, medication, family history

Reproductive History

Female - menses, sexual activity, pregnancies, contraceptives, hormone therapy

Male - sexual activity, contraceptives

Biospecimen Collection

15 ml fasting blood, first morning urine sample, toe nail clippings

Anthropometric Measures

Standing and sitting height, weight, blood pressure, waist, hip and thigh circumference, triceps and scapula skinfold