The study is a randomized parallel experiment with two non-overlapping intervention groups and one control group. The design is registered in the US National Library of Medicine and the American Economic Association’s Registry for Randomized Controlled Trials.
The respondents in this group were given personalized information regarding their risk of developing a CVD in the next 10 years, predicted from the information on their risk factors. This aims to assess if the respondents’ risk perceptions and health behavior change after they are given this information.
In the second treatment group, the respondents were given a chance to enter a raffle with a monetary prize, on the condition that they go to an RHU/CHC for a checkup. The intervention aims to determine the effectiveness of the raffle in encouraging people at-risk of CVD to go to public health centers, and also to assess the implementation of the Philippine Package of Essential Non-Communicable Disease Prevention (PhilPEN) protocol.
Nueva Ecija, which is located 180 km north of Manila, was chosen to be the site of the study because its poverty rate is higher than the national average (29.6% as compared to the national rate of 26.3% in 2015) and the study aims to induce the locals to visit rural health units and community health centers, which mainly serve the poorer population. Central Luzon is also one of the regions with the highest prevalence of major CVD risk factors, such as high blood glucose and smoking, according to FNRI-DOST.
Over 5,000 respondents were sampled from 304 barangays in Nueva Ecija. These respondents are 40 to 70 years of age at the time of the survey and have not been diagnosed of a heart condition or diabetes. The barangays were randomly assigned to the treatment groups or the control group.
Food and Nutrition Research Institute-Department of Science and Technology (FNRI-DOST) (2015). Philippine Nutrition Facts and Figures 2013: Clinical and Health Survey. FNRI Bldg., DOST Compound, Bicutan, Taguig City, Metro Manila, Philippines.