Effectiveness of WHO PEN- Guided Life style Intervention on Blood Pressure, Health Behaviors and Medication Adherence among Industrial Workers with Hypertension in Hosur: A Quasi Experimental Study

This quasi-experimental study aims to evaluate the effectiveness of a WHO PEN–guided lifestyle intervention on blood pressure control, health behaviors, and medication adherence among industrial workers with hypertension in Hosur, Tamil Nadu. Two large industries (>10,000 workers) will be selected from SIPCOT Phase I and II using multistage stratified sampling. One industry will be assigned to the intervention group and the other to the control group by simple randomization (coin toss).

A total of 358 hypertensive workers (179 per group) will be selected through simple random sampling from occupational health records. The intervention group will receive structured WHO PEN-based lifestyle counseling at baseline, 2, 4, and 6 months, along with weekly reinforcement messages. The control group will receive routine health education practiced in the industry.

Primary outcome: change in systolic and diastolic blood pressure over 6 months. Secondary outcomes: changes in dietary practices, physical activity, tobacco/alcohol use, and medication adherence (MMAS-8).

Blood pressure, anthropometry, and lifestyle parameters will be assessed at baseline and at 6 months. Data will be analyzed using paired/unpaired t-tests, chi-square tests, and repeated measures ANOVA. The study aims to generate evidence on integrating WHO PEN lifestyle counseling into industrial health systems to improve hypertension management.