Optimizing Ventilation to Improve Health

Stanford University

Status: Completed

Conditions: Pollution; Exposure

Treatments: Other: Installation of ventilation

Study type: Interventional

Funder types: Other

Identifiers

NCT03894995

46212

Details and patient eligibility

About

Our overall goal is to optimize preferred, ventilating windows/apertures/vents in low-income neighborhoods of Dhaka, Bangladesh. We will:

I. Collect baseline data on housing types and finalize windows/vents protoypes.

II. Measure the impact of improved ventilation on air exchange rates in houses in low-income neighborhoods of Dhaka and characterize the current and potential market for windows/vents in households in low-income neighborhoods of Dhaka, Bangladesh.

III. Understand recipients' (tenants and landords) perceived benefits of installed window/vent designs and difficulties faced with adoption of each design

Enrollment: 240 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 1. lack cross-ventilation at the time of enrollment
• 2. have obtained landlord permission to make adjustments to their dwelling,
• 3. have a free roof where a window can be installed

Exclusion criteria

• 1. Household reports receiving dust from nearby machine that pulverizes materials for making roads

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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240 participants in 5 patient groups

Part 1. Focus group discussions on ventilation preferences

No Intervention group

Description:

Participant's perceived benefits/detriments of having ventilation options in the household and their opinions on the behavior change material developed to encourage increased household ventilation will be explored using 6-9 focus group discussions with 10-12 participants each.

Part 2. PM 2.5 pilot

No Intervention group

Description:

Indoor, outdoor, and personal particulate matter concentrations among ten mother-child pairs and their homes will be monitored.

Part 3. Intervention

Experimental group

Description:

Households will participate in a baseline survey and a Beck-DeGroot-Marshak auction to establish willingness-to-pay for ventilation. If the household wins, or if it is decided to install ventilation in all intervention households, the household will receive installation of a ventilating mechanism.

Treatment:

Other: Installation of ventilation

Part 3. Control

No Intervention group

Description:

For 12 month after intervention, the air exchange rate will be measured in all control households.

Part 4. Spillover

No Intervention group

Description:

Households that neighbor enrolled study households will be surveyed and asked whether they, on their own, chose to install a window. If they did install a window, they will be asked how much they paid.