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NCT Number: NCT05511701

Preventing Ischemic Heart Disease With mHealth (Mobile Health), Electronic Decision Support and Community Health Workers

This is a cluster-randomized clinical trial (cRCT) designed to assess the effectiveness of a multicomponent strategy linking key aspects of the cardiovascular disease (CVD) care continuum across three provinces in Argentina using using five primary components: a data management system linking a digital mHealth (mobile health) screening tool used by community health workers (CHWs), an electronic appointment scheduler which is integrated with the clinic electronic appointment system, point of care (POCT) testing for lipids, a clinical decision support system for medication initiation, and a text message (SMS) reminder system to improve treatment adherence and life-style changes.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Cardiovascular Diseases (CVD) Cardiovascular Diseases

Age range

40 year–74 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Iecs Instituto de Efectividad Clinica Y Sanitaria

Buenos Aires, Argentina

About this study

954 eligible women and men aged 40-74 with high CVD risk living in the catchment area of 18 primary care clinics (PCCs) in 3 different provinces (Quilmes, La Rioja, and San Juan) in Argentina will be recruited for the study. Eighteen PCCs will be randomized to either the usual care (control) arm or the intervention arm (3 usual care and 3 intervention PCCs in each province). Participants who reside in the catchment area of intervention PCCs will receive the multicomponent intervention with central data management system linking digital mHealth (mobile health) screening tool for CHWs, electronic appointment scheduling which is integrated with the clinic electronic appointment system, point of care testing (POCT) for lipids, clinical decision support for medication initiation, and a SMS reminder system for adherence to medications and life-style changes, while participants who reside in the catchment area of usual care PCCs will receive usual care with paper-based guidelines used by community health workers and providers. The recruitment goals are 477 persons in the intervention arm and 477 in the usual care arm. Participants will be enrolled for a 12 month study period from baseline visit, and the primary outcome is mean difference in absolute 10-year CVD risk.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • aged 40-74
  • depend exclusively on public health insurance
  • have access to a cell phone for personal use
  • can open and read SMS messages on cell phone
  • receive primary care at the local PCC
  • have a 10-year CVD risk >= 10% and mean SBP >= 140 mmHg OR
  • have a 10-year CVD risk >= 10% and LDL-C >= 70 mg/dL for persons with diabetes OR
  • have a 10-year CVD risk >= 10% and LDL-C >= 100 mg/dL for persons without diabetes

Exclusion criteria

  • Persons who plan to move from the neighborhood within the next 2 years
  • pregnant at the time of screening
  • Bed bound
  • Weight > 180 kg - this exceeds the upper limit that can be measured on portable scales.
  • Total cholesterol < 100 mg/dL or > 500 mg/dL.
  • LDL-C > 300 mg/dL
  • Triglycerides < 45 mg/dL or > 400 mg/dL.
  • HDL < 15 mg/dL.
  • Systolic blood pressure (SBP) >=180 mmHg or Diastolic blood pressure (DBP) >= 120 mmHg, and experiencing chest pain, palpitations, or shortness of breath.
  • currently on dialysis or has a history of chronic kidney disease.
  • self-reported history of CVD (stroke, AMI).
  • self-reported history of a liver abnormality.
  • have a mid-upper arm circumference > 42 cm - this is the maximum cuff size available for use with blood pressure monitors in Argentina
  • do not consent to participate.

Treatment and study plan

CHW Care Model

Behavioral

The CHW will measure the participant's blood pressure (BP) and along with other demographic variables, calculate the participant's absolute CVD risk score, using the mHealth (mobile health) app. If the participant's risk is > 10%, they are asked to sign the informed consent. The CHW will electronically schedule an appointment at the PCC. The participant will receive a SMS appointment confirmation. S/he will have their cholesterol tested by nurses using a home POCT. Nurses will repeat POCT lipids and BP measurements at all PCC visits and other clinical information will be entered into the electronic decision support tool that will generate a guideline based treatment recommendation for the physician. CHWs will make up to four home visits or telephone calls to intervention participants over the 12 month study period to check on medication adherence, as well as to determine if the patient is in possession of the medication

Usual Care Model

Behavioral

All study participants will be visited in their home by a CHW and a nurse for eligibility assessment, screening, and enrollment. The CHW will then measure the participant's blood pressure and the readings along with other demographic variables already collected, to calculate the participant's absolute CVD risk score. In the usual care arm the CHW will use the WHO paper-based non-lab CVD risk calculator and, if the participant's risk is > 10%, they are asked to sign the informed consent and s/he will have their cholesterol tested by nurses using POCT during a home enrollment visit. The CHW will further verbally encourage her/him to schedule an appointment with a primary care physician at the PCC for evaluation. This is the usual care practice.

Primary outcomes

  1. Difference in mean change in absolute CVD risk, calculated using the Framingham cardiovascular disease lab-based risk equation, between study arms at 12 months

    Time frame: At enrollment (baseline) and 12 months after enrollment

    The difference in mean change in 10-year CVD risk between study arms

Secondary outcomes

  1. Difference in mean change in LDL-C between study arms at 12 months

    Time frame: At enrollment (baseline) and 12 months after enrollment

    The difference in mean change in LDL-C between study arms.

  2. Difference in mean change in systolic blood pressure between study arms at 12 months

    Time frame: At enrollment (baseline) and 12 months after enrollment

    The difference in mean change in systolic blood pressure between study arms.

  3. Changes in smoking rates over 12-month study period

    Time frame: At enrollment (baseline) and 12 months after enrollment

    The difference in mean smoking rates between study arms

  4. Medical costs incurred over 12-month study period

    Time frame: From enrollment to end of the study period at 12 months

    The difference in medical costs between study arms

  5. Medication possession ratios at 12 months between study arms

    Time frame: At 12 months after enrollment

    Ratio of prescribed statins and anti-hypertension medications in participants' possession

  6. Medication intensity changes

    Time frame: From enrollment to end of the study period at 12 months

    Number of treatment intensity changes for statins and anti-hypertension medications in the intervention arm

  7. Major adverse reactions for statins and anti-hypertension medications

    Time frame: From enrollment to end of the study period at 12 months

    Number of reported adverse reactions for statins and anti-hypertension medications in intervention arm

  8. Quality adjusted life years (QALYs)

    Time frame: From enrollment to end of the study period at 12 months

    Summary of the impact the intervention on CVD risk

  9. Proportion of patients with a 10-year CVD risk ≥ 10% that complete a first visit at the local clinic within 6 weeks after enrollment in the study.

    Time frame: 6 weeks from enrollment.

    Proportion of patients with a 10-year CVD risk ≥ 10% that complete a visit at the local clinic within 6 weeks after enrollment in the study.

  10. Proportion of patients with a 10-year CVD risk ≥ 10% that complete a first visit at the local clinic within 4 months after enrollment in the study.

    Time frame: 4 months from enrollment

    Proportion of patients with a 10-year CVD risk ≥ 10% that complete a first visit at the local clinic within 4 months after enrollment in the study.

  11. Number of clinical visits between study arms at 12 months

    Time frame: From enrollment to end of the study period at 12 months

    Number of clinical visits by participants to primary care clinics

  12. Health utilization outcomes

    Time frame: From enrollment to end of the study period at 12 months

    Number of hospitalizations, emergency room visits, outpatient visits and procedures, and primary care clinic visits

  13. Mortality

    Time frame: From the start of enrollment to 12, then 60 months after enrollment

    Number of deaths from all causes

Sponsors and collaborators

Lead sponsor

Harvard School of Public Health (HSPH)

Other

Registry information

Official study title

Preventing Ischemic Heart Disease With mHealth, Electronic Decision Support, and Community Health Workers (PRIMECare Trial)

Acronym: PRIMECare

Important dates

Study start
2022
Primary completion
2026
Study completion
2026
First posted
Aug 23, 2022
Registry last updated
Feb 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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