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Work and Iron Status Evaluation

This study has been completed.
Information provided by:
National Institute on Aging (NIA) Identifier:
First received: October 8, 2004
Last updated: January 26, 2010
Last verified: August 2008

This project seeks to understand how changes in the health of an individual affects the economic and social prosperity of the individual, family and community. The study involves providing iron supplements to a sample of participants in Central Java Indonesia and following those respondents for three years. They are compared with a control group who do not receive the supplement.

Condition Intervention
Drug: Iron Supplement, 120mg

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Work and Iron Status Evaluation (WISE)

Resource links provided by NLM:

Further study details as provided by National Institute on Aging (NIA):

Estimated Enrollment: 16000
Study Start Date: January 2002
Study Completion Date: July 2007
Primary Completion Date: July 2007 (Final data collection date for primary outcome measure)
Detailed Description:

The goal of the study is to pin down the causal effect of improvements in health on the economic and social prosperity of individuals and their families. Particular attention will be paid to the dynamics underlying the effect of health on labor outcomes; older adults are more likely to experience transitions in health and economic status and so will be emphasized.

Beginning in 2002, about 4,000 households will be interviewed every four months for about 3 years. The first two waves of the survey will serve as baselines. After the second wave, households will be randomly assigned to one of two groups. Iron supplements will be provided to all members of households assigned to one of those groups. Household members in the 2nd group will receive an identical-looking placebo. Participants will take the supplements (or placebo) on a weekly basis for a year. The study will measure the effect of supplementation on the well-being of individuals and their families.

Data will be collected at the individual, household and community level. Individual level data will cover time allocation including work and participation in community activities, earnings, self-reported and physical health and cognition. All adult household members will be interviewed; questions about children will be answered by a caretaker. Data on wealth and consumption will be collected at the household level. Community resources, services and infrastructure information will be gathered along with detailed price data.


Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Resident in village in study area in Purworejo District, Central Java, Indonesia

Exclusion Criteria:

  • None
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00094042

Purworejo District, Central Java, Indonesia
Sponsors and Collaborators
Principal Investigator: Duncan Thomas Department of Economics, UCLA
  More Information

Additional Information:
No publications provided Identifier: NCT00094042     History of Changes
Other Study ID Numbers: AG0007, 5R01AG020909-04
Study First Received: October 8, 2004
Last Updated: January 26, 2010
Health Authority: United States: Federal Government

Keywords provided by National Institute on Aging (NIA):
Socioeconomic Factors
Dietary Supplementation processed this record on November 20, 2014