Rural China Electric Kettle Promotion Program

Not Applicable

Active, not recruiting

• Conditions: Diarrheal Disease; Compliant Behavior; Pollution; Exposure
• Interventions: Behavioral: Electric Kettle Promotion

• Registration Number: NCT03376152
• Lead Sponsor: University of California, Berkeley

Brief Summary

This study will evaluate the impact of a pilot Rural Electric Kettle Promotion Program offered to low-income households in rural Anhui Province, China. The primary objective of this study is to determine whether this promotion program causes poverty households currently boiling their drinking water with solid-fuels (or drinking untreated water or bottled water) to switch to boiling their drinking water with electric kettles, and if so, how such a switch might improve safe drinking water access and/or reduce household air pollution.

Detailed Description

Previous research suggests that increasing the use of electric kettles for boiling (i.e., treating) drinking water in low-income areas of rural China could help expand access to safer drinking water, reduce household air pollution, and improve environmental and health outcomes in rural Chinese households currently boiling drinking water with solid-fuels (or not treating their water, or drinking contaminated bottled water).

The study will use a parallel arm cohort cluster-randomized controlled trial design with a 1:1 ratio. The study will randomize 30 clusters (i.e., villages) to treatment or control using stratified randomization by geography (two levels: mountains and plains) and by cluster proportions of reported electric kettle use at baseline. Randomization sequence generation will be conducted by A. Cohen using a random number generator (with a reproducible seed) in Stata v.13.1 (StataCorp, College Station, Texas, USA).

The study will collect data from 30 randomly selected households in 15 villages, for a total of 900 households. This sample size was powered to measure a 15% (or larger) change in electric kettle adoption, because the Chinese Center for Disease Control and Prevention (China CDC) will be unlikely to rollout a national program if adoption rates are less than 15%.

After baseline data collection and randomized allocation, in the intervention group village-level promotion events will take place in November-December of 2017, and will be organized by the provincial and county China CDC, in collaboration with the National Center for Rural Water Supply Technical Guidance (NCRWSTG). At these promotion events, households in the intervention group will be provided free, food-grade quality, electric kettles, as well as promotional materials (a calendar and poster) and information about the benefits of electric kettle use and improved hygiene and sanitation practices.

Because of known issues with decreasing adoption of drinking water treatment after behavior change promotion interventions such as this, and considering expected seasonal variation in boiling practices and frequencies, study data was initially planned to be collected over a period of 12 months (with additional qualitative follow-up via focus groups: 2019-03, 2019-08).

We were able to extend the follow-up data collection period from 12-months to 24-months, so we did not collect data from focus groups in 2019-03 or 2019-08 as originally planned. Follow-up data collection was completed in November 2019.

Due to the COVID-19 pandemic, we again postponed plans to collect data from focus groups (data cleaning efforts were delayed until 2021, and completed at the end of 2022). Logistics allowing, we hope to collect data from focus groups in 2023.

Study Timeline

• Study Start: 2017-11-04
• Study First Submitted: 2017-11-28
• Study First Submitted QC: 2017-12-12
• Study First Posted: 2017-12-18
• Primary Completion: 2019-12-31
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-25
• Last Update Posted: 2025-03-30
• Study Completion: 2025-12

Recruitment & Eligibility

• Status: ACTIVE_NOT_RECRUITING
• Sex: All
• Target Recruitment: 6000

Inclusion Criteria

• Persons aged 18 or older will be eligible to provide consent for their households.
• Government classified "poverty households" (poverty classification based on 2016 data/records).

Exclusion Criteria

• Persons aged 17 or younger will not be eligible to provide consent for their households.
• We will not have any exclusion criterion based on gender, race, ethnicity, language, or literacy.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Treatment Arm	Electric Kettle Promotion	"Poverty households" invited to attend cluster-level electric kettle promotion events and offered free kettles, information, and promotional materials 450 households in 15 clusters (30 households per cluster)

Primary Outcome Measures

Name	Time	Method
Change in proportion of households using electric kettles for boiling drinking water	24 months.	Primary measurement via electricity use meters (Tepsung model 10/16A) affixed to electric kettle power cables for all household who report using electric kettles at each of five visits (based on total KWh consumed per data collection intervals and estimated mean liters boiled per person, per day, per household, by electric kettle type/size). Additional measurement via self-report of electric kettle use (household surveys) and via enumerator direct observations (during visits to households).

Secondary Outcome Measures

Name	Time	Method
Diarrhea prevalence	24 months.	Self-report (current, 7-day recall, 14-day recall)
Thermotolerant coliforms in household point-of-consumption drinking water	6 months.	Point-of-consumption drinking water sample collection from subsample of households (150 in each arm, 300 total) and laboratory analysis via multiple tube fermentation (using China CDC national standards and protocol) for Thermotolerant coliforms, an indicator of fecal contamination.
Prevalence of hand washing with soap	24 months.	Self-report during household surveys combined with enumerator direct observations
Particulate matter 2.5 mg/m3 (PM2.5) concentrations	1 month.	Custom-built air pollution sensors (PM2.5 and other - developed by Prof. Tao Shu et al. at Peking University, Beijing, CHINA) installed to collect indoor air pollution data for 3-4 weeks in a subsample of households (40-50 in each arm, 80-100 total), with 3-5 external air pollution sensors installed in each cluster to control for ambient air pollution.

Trial Locations

Locations (1)

National Center for Rural Water Supply Technical Guidance，Chinese Center for Disease Control and Prevention; 🇨🇳 Beijing, China