Effectiveness of a scalable group-based education and monitoring program, delivered by health workers, to improve control of hypertension in rural India: A cluster randomised controlled trial

Figures

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  Fig 1. Flow diagram of trial participants. ‘Not meeting inclusion criteria’ refers to those not categorised as hypertensive when re-assessed for eligibility. BP, blood pressure; PHC, primary health centre; RCT, randomised controlled trial.

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  Fig 2. Educational attainment of participants by region. n = 1,711 (18 missing observations for the Rishi Valley and 5 missing for West Godavari, with none imputed). *P < 0.01, with Bonferroni correction for specific contrasts between each of the 3 regions.

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  Fig 3. Summary of study findings. SBP (A) and DBP (B) at baseline and follow-up according to study group. Change in SBP (C) and DBP (D) in the usual care and intervention groups. Proportion of patients with controlled BP (E) and taking BP-lowering medications (F) at baseline and follow-up according to study group. P values for categorical variables were generated using a test for 2-sample differences in proportions (E and F), while differences in continuous variables were generated using linear regression (A–D). Error bars show 95% confidence limits. BP, blood pressure; DBP, diastolic blood pressure; SBP, systolic blood pressure.

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  Fig 4. Forest plot of differences in control of BP by group, according to different characteristics of the sample (complete case analysis). The dashed line represents the line of no effect. Symbols show point estimates, and error bars show 95% confidence limits. P values indicate subgroup interactions (obtained using logistic regression). The following variables had missing data: BMI, 7; access to healthcare, 9; and regular check-ups, 7. BMI, body mass index; BP, blood pressure; DBP, diastolic blood pressure; SBP, systolic blood pressure.