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Table 4 Intervention fidelity measures

From: Statistical analysis plan for the control of blood pressure and risk attenuation-rural Bangladesh, Pakistan, Sri Lanka (COBRA-BPS) trial: a cluster randomized trial for a multicomponent intervention versus usual care in hypertensive patients

Fidelity measure

Definition

Home health education (HHE) session delivery rate

Calculated as the total number of three-monthly HHE sessions delivered at the household level using the Community Health Workers Monitoring and Home Health Education Checklist divided by the total number of planned HHE sessions until the study discontinuation/completion, multiplied by 100.

Physician referral rate

Calculated as the total number of times they are referred to trained physicians by CHWs using the General Practitioner Referral Checklist divided by the total number of times participants identified with having poorly controlled BP (SBP ≥ 160 mmHg or DBP ≥ 100 mmHg) during study visits until the study discontinuation/completion, multiplied by 100.

Physician’s evaluation rate

Calculated as the total number of times they are evaluated by trained physicians using the General Practitioner Management Checklist divided by the total number of times participants identified with having poorly controlled BP during study visits until the study discontinuation/completion, multiplied by 100.