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Stimulating Private Sector Malaria Control (Outgrowers)

This study has been completed.
Information provided by (Responsible Party):
Richard Sedlmayr, PATH Identifier:
First received: June 21, 2011
Last updated: January 7, 2015
Last verified: January 2015
Preliminary evidence from ongoing research provides strong indications that protecting farmers from malaria would be profitable for outgrowing agribusinesses in sub-Saharan Africa. The study team invests in experimental research to investigate this conjecture in more detail.

Condition Intervention
Malaria Device: Insecticide-treated net (BASF Incerceptor)

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Health Services Research
Official Title: Stimulating Private Sector Malaria Control: The Outgrower Opportunity

Resource links provided by NLM:

Further study details as provided by Richard Sedlmayr, PATH:

Primary Outcome Measures:
  • Cotton Yields [ Time Frame: 2010-2011 season (up to 1 year) ]
    Farmer's cotton yields (kg delivered per household), as defined in the routine data collection system of the participating cotton outgrowing agribusiness

Secondary Outcome Measures:
  • Contract Defaults [ Time Frame: 2010-2011 season (up to 1 year) ]
    Defaults on input loans, as defined in the routine data collection system of the participating cotton outgrowing agribusiness. Odds ratios calculated in accordance with NIH guidance:

  • Increase in Maize Productivity [ Time Frame: 2009-2010 and 2010-2011 seasons (up to 2 years) ]
    Increase in self-reported maize productivity (yield on maize plots divided by size of maize plots), collected through validation survey; calculated as maize productivity 2010-11 minus maize productivity 2009-10, measured in bags (ordinarily 50kg bags; however, kg measure not specified)

  • Self-reported Malaria Prevalence [ Time Frame: 2010-2011 season (up to 1 year) ]
    Over two weeks before interview, collected through validation survey. Odds ratio calculated in accordance with NIH guidance

Enrollment: 81597
Study Start Date: December 2010
Study Completion Date: December 2013
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Treatment: Insecticide-treated net
Smallholder farmers in the treatment group are informed that they won a raffle, and receive a free insecticide-treated net
Device: Insecticide-treated net (BASF Incerceptor)
One per farmer, once during the 2010-2011 season
No Intervention: Control
Smallholder farmers in the control group are informed that they had a chance to win an insecticide-treated mosquito net in a raffle, but did not end up winning

Detailed Description:

The study evaluates whether the sourcing of insecticide-treated nets and their distribution to smallholder farmers for free would be a profitable investment for a cotton outgrowing agribusiness in Zambia.

The study therefore carries out a major net distribution through the existing distribution channels of a cotton outgrowing agribusiness, evaluates the impact of this distribution on smallholder cotton yields, and values the profitability implications for the outgrowing agribusiness.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Farmers who contracted with the participating cotton outgrowing company in the 2010-2011 season
  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: NCT01397851

National Malaria Control Centre
Lusaka, Zambia
Sponsors and Collaborators
  More Information

Additional Information:
Responsible Party: Richard Sedlmayr, Principal Investigator, PATH Identifier: NCT01397851     History of Changes
Other Study ID Numbers: PATH Outgrowers
Study First Received: June 21, 2011
Results First Received: November 20, 2014
Last Updated: January 7, 2015

Additional relevant MeSH terms:
Protozoan Infections
Parasitic Diseases processed this record on July 19, 2017