Social Network Interventions in Rural Honduras

President and Fellows of Harvard College

Status: Completed

Conditions: Social Transmission of Health Behaviors; Malnutrition; Dysentery

Treatments: Behavioral: nominated by random; Behavioral: exposure to water chlorination; Behavioral: exposure to vitamin use; Behavioral: high in-degree

Study type: Interventional

Funder types: Other

Identifiers

NCT01672580

Lempira_Phase2

Details and patient eligibility

About

This project will examine the spread of health interventions with a randomized control trial design by introducing public health interventions in 32 villages in the Honduran Department of Lempira. Based on identified public health needs in the region, namely improved drinking water and diet, this study will provide training on the use of chlorine (sodium hypochlorite) for water purification and multivitamins for nutritional supplementation. In some villages, individuals selected for their social connectedness will be trained and given coupons that can be redeemed for either chlorine bleach or multivitamins, and these persons will be asked to spread this information and distribute coupons to four people of their choosing. In other villages, individuals selected at random will receive the same training, materials, and instructions. A second wave of coupon distribution will provide coupons to those who received a coupon from the original "seed" groups so that they may disperse these coupons further out in the social networks. Over the following months, study investigators will look at how knowledge of these health practices, and uptake or and adherence to the practices, spreads throughout the villages.

More specifically, the investigators will examine the speed and extent of spreading of these new health practices after introducing them to three different initial "seed" groups: (1) people chosen on the basis of being named as a friend by many people in their village, (2) people chosen based on being named as a friend by a randomly chosen individual, and (3) a group of randomly chosen individuals. It is hypothesized that spread will occur faster and/or to a greater extent when the intervention is started in groups 1 and 2 versus group 3 (control group).

Enrollment: 5,773 patients

Sex: All

Ages: 15+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Residents of Targeted Communities, ages 15 and up

Exclusion criteria

• Children younger than age 15

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Factorial Assignment

Masking: Single Blind

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5,773 participants in 6 patient groups

Random-Cloro

Active Comparator group

Description:

exposure to water chlorination

Treatment:

Behavioral: exposure to water chlorination

Random-Vitamin

Active Comparator group

Description:

exposure to vitamin use

Treatment:

Behavioral: exposure to vitamin use

Indegree-Cloro

Experimental group

Description:

high in-degree, exposure to water chlorination

Treatment:

Behavioral: high in-degree

Behavioral: exposure to water chlorination

Indegree-Vitamin

Experimental group

Description:

high in-degree, exposure to vitamin use

Treatment:

Behavioral: high in-degree

Behavioral: exposure to vitamin use

Nominated-Cloro

Experimental group

Description:

nominated by random, exposure to water chlorination

Treatment:

Behavioral: nominated by random

Behavioral: exposure to water chlorination

Nominated-Vitamin

Experimental group

Description:

nominated by random, exposure to vitamin use

Treatment:

Behavioral: nominated by random

Behavioral: exposure to vitamin use