Evidence

Accurate care, measured on real cases

Every case is reviewed by an HPCSA-registered doctor, so we can measure how often PRIME gets it right. Here are our own results, what nurses say, and the published research behind nurse-led, doctor-backed care.

  • Cochrane systematic review, 2026
  • South African clinical trials
  • HPCSA & SAHPRA guidance
  • 9/10times, the reviewing doctor agrees with the diagnosis the nurse made with PRIME
  • 1,900+cases reviewed and signed off by HPCSA-registered doctors

01Our own testing

What we have tested, and how

  • 9/10

    Diagnostic agreement

    9 out of 10 times, the reviewing doctor agrees with the diagnosis the nurse made with PRIME.

  • 1,900+

    Doctor-reviewed cases

    Every one signed off by an HPCSA-registered doctor, in pharmacies, clinics, hospitals and retirement homes.

  • SA

    Ambient scribe, tested on local voices

    Tested on real consultations across South African accents, and compared with other scribes on the market.

  • STG

    Built on South African guidelines

    Treatment follows the Primary Healthcare Standard Treatment Guidelines and Essential Medicines List. Danger signs are checked first.

02Peer-reviewed evidence

What the evidence says

Main study · 2026

Nurses match doctors in delivering hospital care

Cochrane is an independent network that pools the results of every good-quality trial on a question. Its 2026 review compared care led by nurses with care led by doctors in hospital wards and outpatient clinics, in fields including heart disease, diabetes, cancer and rheumatology. It found little to no difference in deaths, quality of life, patients' confidence in managing their own health, or safety incidents. Nurse-led care may do better for diabetes control, cancer follow-up and skin conditions, often because patients could see a nurse sooner or more often. Doctors did slightly better in a small number of sexual health and abortion follow-up services.

“Nurse substitution isn't simply a one-for-one replacement. To work well, these services need the right training, support and models of care.”Prof. Timothy Schultz, senior author

Source: Butler et al., Cochrane Database of Systematic Reviews, 2026

  • 82randomised trials
  • 28,000+patients
  • 20countries

More research behind the model

Decades of trials, from South African clinics to hospitals around the world, point the same way. Tap any study to read it.

  • Primary care · 2018

    Nurses as substitutes for doctors in primary care

    A Cochrane review of 18 trials: care from nurses probably gives similar or better health outcomes than care from doctors, and patients are probably slightly more satisfied.

    Laurant et al., Cochrane Database of Systematic Reviews, 2018 →
  • South Africa · 2012

    Nurse-started HIV treatment in 31 clinics

    Across 31 South African primary care clinics and more than 15,000 patients, trained and supported nurses started HIV treatment with survival and viral suppression no worse than when doctors did.

    Fairall et al., The Lancet, 2012 →
  • South Africa · 2010

    Nurse-monitored HIV care in Soweto and Cape Town

    In a randomised trial of 812 patients, HIV treatment monitored by nurses was shown to be non-inferior to treatment monitored by doctors.

    Sanne et al., The Lancet, 2010 →
  • Africa · 2014

    Shifting HIV care from doctors to nurses

    A Cochrane review of ten African studies: moving care to adequately trained and supported nurses probably does not lower its quality, and care closer to home cut patients' travel costs.

    Kredo et al., Cochrane Database of Systematic Reviews, 2014 →
  • South Africa · 2005

    Training nurses finds more tuberculosis

    In Free State clinics, short educational outreach to nurses using a guideline-based approach found more cases of tuberculosis, without extra staff.

    Fairall et al., BMJ, 2005 →
  • Primary care · 2014

    Nurse-led care: higher satisfaction, fewer admissions

    A meta-analysis of randomised trials found higher patient satisfaction with nurse-led care, and fewer hospital admissions and deaths, though the effect was weaker in the highest-quality trials.

    Martínez-González et al., BMC Health Services Research, 2014 →
  • Primary care · 2002

    Nurse practitioners and doctors: equivalent care

    A BMJ review of 34 studies found no difference in patients' health, and patients were more satisfied with nurse practitioners, who gave longer consultations.

    Horrocks et al., BMJ, 2002 →
  • Primary care · 2015

    Quality of primary care by advanced practice nurses

    Seven randomised trials with 10,911 patients found few differences between nurses and doctors, and nurse care was better on some measures, such as blood pressure.

    Swan et al., International Journal for Quality in Health Care, 2015 →
  • Randomised trial · 2000

    1,316 patients, randomised to a nurse or a doctor

    Six months later their health was no different, results for diabetes and asthma were similar, and people with high blood pressure seen by nurses had slightly lower readings.

    Mundinger et al., JAMA, 2000 →
  • Blood pressure · 2010

    Nurse-led hypertension care works best with an algorithm

    When nurses followed a stepped treatment algorithm, systolic blood pressure fell 8.2 mmHg more than with usual care. The authors conclude nurse-led care needs an algorithm to structure it. PRIME is that structure.

    Clark et al., BMJ, 2010 →
  • Decision support · 2020

    Clinical decision support improves care

    Across 122 trials and more than 1.2 million patients, computer decision support increased the share of patients getting the recommended care, with small to moderate gains.

    Kwan et al., BMJ, 2020 →
  • Diagnosis · 2014

    1 in 20 adults

    Even in well-resourced health systems, about 1 in 20 adults experiences a diagnostic error in outpatient care each year. A structured history and a ranked differential are how PRIME guards against it.

    Singh et al., BMJ Quality & Safety, 2014 →
  • Workforce · 2025

    29.8 million nurses worldwide

    The World Health Organization counts about 29.8 million nurses worldwide, but they are unevenly spread: most work in countries holding under half the world's population.

    World Health Organization, State of the world's nursing 2025 →

03How we measure accuracy

Every doctor review is a check on PRIME

  1. 1

    The nurse consults with PRIME

    PRIME guides the history and examination, and suggests a ranked diagnosis and a treatment from South Africa's Standard Treatment Guidelines.

  2. 2

    A doctor reviews the case

    For every case, an HPCSA-registered doctor reviews the full case and confirms or changes the diagnosis and the script.

  3. 3

    We compare the two

    We record whether the doctor agreed with the diagnosis the nurse made with PRIME. Today the doctor agrees 9 out of 10 times.

  4. 4

    Changes make PRIME better

    Where a doctor changes a diagnosis or a script, it shows us where PRIME can improve.

What nurses say

Thanks again for teaching me so much and turning me into a mini doctor.
Sr MotsisiProfessional nurse
The system is just perfect and helped me so nicely.
Sr MosolodiProfessional nurse

Why nurses?

More affordable, more accessible, more accurate healthcare

At PRIME we want to create more affordable, more accessible and more accurate healthcare. For most South Africans the first clinician they see, and often the only one, is a nurse. So we build around the nurse: South African guidelines in every consultation, and a doctor who reviews every case. The research below shows this approach works.

  • More accessible

    There are more than 265,000 registered nurses in South Africa, nearly five for every doctor, and they work where patients live: clinics, pharmacies, workplaces and rural communities. Care that starts with a nurse can start close to home, today.

    Source: South African Nursing Council, 2024; World Economic Forum

  • More affordable

    A nurse-led visit uses a doctor's time only where it is needed. The research on cost is mixed: of the trials in the 2026 Cochrane review that measured it, 17 found nurse-led care cost less and 9 found it cost more. We keep our own prices low and published.

    Source: Butler et al., Cochrane Database of Systematic Reviews, 2026

  • More accurate

    Every PRIME consultation follows the South African primary care guidelines step by step. Danger signs are checked first. Every case is reviewed by a doctor registered with the HPCSA (Health Professions Council of South Africa), who signs the prescription. Good care depends on the right training, support and model of care, not on who wears the stethoscope.

    Source: Butler et al., Cochrane Database of Systematic Reviews, 2026

Built to South African standards

PRIME was developed according to the guidance South Africa's health regulators have issued on artificial intelligence in medicine. These are the documents we work to:

  • HPCSA

    Booklet 20: Ethical guidelines on the use of artificial intelligence (2025)

    How registered practitioners may use AI ethically: the practitioner stays responsible for every decision, the patient's privacy and consent come first, and AI supports clinical judgement but never replaces it.

    Read the document →
  • HPCSA

    Booklet 10: General ethical guidelines for good practice in telehealth

    How a doctor may review and treat a patient at a distance, as PRIME's reviewing doctors do, to the same standard as an in-person visit.

    Read the document →
  • SAHPRA

    Communication to Industry MD08 (2025/2026): AI and machine learning-enabled medical devices

    The South African Health Products Regulatory Authority's guiding principles for AI in medical software: local validation, safety, transparency and ongoing monitoring.

    Read the document →

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