Decision explorer
Screening: the honest two columns
Health checks and screening can offer benefits, but they can also produce false results, overdiagnosis, follow-up burdens, or false reassurance. Compare both sides of seven common conversations without receiving a schedule or personal recommendation.
Blood pressure checks
What it looks for: A raised blood pressure measurement that may need repeat or out-of-clinic assessment before hypertension is diagnosed.
Potential benefits
- A simple measurement can identify a reason to assess cardiovascular and kidney risk more closely.
- When persistent hypertension is confirmed, appropriate management can reduce future risk.
Potential harms and limits
- Blood pressure varies with technique, setting, time, stress, and other factors, so one reading can mislead.
- A label based on an unconfirmed result can cause worry or unnecessary follow-up.
Bring these questions to your doctor
- "Was the measurement taken correctly and does it need repeating?"
- "Would home or ambulatory monitoring add useful context?"
Whether and when this screening applies to you depends on age, sex, history, and local availability in Mauritius: that decision belongs in a consultation, not on a website.
All seven, in full
Blood pressure checks
Looks for: A raised blood pressure measurement that may need repeat or out-of-clinic assessment before hypertension is diagnosed.
Potential benefits
- A simple measurement can identify a reason to assess cardiovascular and kidney risk more closely.
- When persistent hypertension is confirmed, appropriate management can reduce future risk.
Potential downsides and limits
- Blood pressure varies with technique, setting, time, stress, and other factors, so one reading can mislead.
- A label based on an unconfirmed result can cause worry or unnecessary follow-up.
Blood glucose and HbA1c checks
Looks for: Glucose measurements that may suggest diabetes or increased future risk and may require confirmation.
Potential benefits
- Testing can identify a result that warrants confirmation, clinical assessment, or support.
- Earlier recognition can create time to discuss evidence-based care and risk reduction.
Potential downsides and limits
- Borderline or isolated results can be overinterpreted without repeat testing and clinical context.
- Different tests and temporary health factors can produce results that need careful interpretation.
Cholesterol and lipid checks
Looks for: Blood lipid measurements used alongside other information in cardiovascular assessment.
Potential benefits
- Lipids can contribute useful information to an overall cardiovascular risk discussion.
- Very unusual results can prompt assessment for inherited or secondary causes.
Potential downsides and limits
- A single number can falsely reassure or alarm when separated from overall risk and test context.
- Testing can lead to treatment discussions whose benefits and downsides depend on baseline risk and preferences.
Breast screening with mammography
Looks for: Signs of breast cancer in people without symptoms, before a lump may be noticed.
Potential benefits
- Screening can find some breast cancers earlier.
- Earlier detection can reduce the risk of dying from breast cancer for some screened groups.
Potential downsides and limits
- Mammography can miss cancers or produce an abnormal result that later proves not to be cancer.
- Some screen-detected cancers would not have caused harm during a person's lifetime, but it is not always possible to know which ones.
Cervical screening
Looks for: High-risk HPV and, depending on the pathway, cervical cell changes that may need follow-up.
Potential benefits
- Finding and managing relevant cell changes can help prevent cervical cancer.
- A structured programme can connect an abnormal result to appropriate follow-up.
Potential downsides and limits
- A positive result can cause worry, and not every HPV infection or cell change progresses to cancer.
- Follow-up procedures have burdens and potential harms that should be explained before testing.
Bowel cancer screening
Looks for: Depending on the programme, traces of blood in stool or abnormalities assessed with further testing.
Potential benefits
- Stool testing can be completed at home and can identify people who need further assessment.
- Screening can find some cancers earlier and some follow-up procedures can identify or remove polyps.
Potential downsides and limits
- A positive stool result does not diagnose cancer, and a negative result does not rule it out.
- Follow-up colonoscopy has preparation burdens and uncommon but important complications.
PSA testing
Looks for: A blood level that can be raised by prostate cancer and by several non-cancer causes.
Potential benefits
- Testing may contribute to finding some prostate cancers before symptoms develop.
- An informed discussion can account for personal values about uncertainty and follow-up.
Potential downsides and limits
- PSA is not a cancer diagnosis. Results can lead to repeat tests, imaging, or biopsy, each with limitations and burdens.
- Testing can detect cancers that would not have caused harm, while treatment can have lasting side effects.
Two good companions
Sources
- NHS screening NHSBenefits, risks, limitations, and informed choice in screening.
- Principles of population screening UK National Screening CommitteeCurrent principles for evidence, benefit, harm, follow-up, and informed choice.
- Screening programmes: a short guide World Health Organization Regional Office for EuropeProgramme-level guidance on benefits, harms, quality, and implementation.
- Why breast screening is done NHSPotential benefits, missed cancers, false positives, and overdiagnosis.
- What is cervical screening? NHSWhat cervical screening tests for and what it does not diagnose.
- Your guide to bowel cancer screening NHS EnglandFIT results, follow-up, possible benefits, and limitations.
- PSA test NHSReasons for testing, non-cancer causes of a raised result, and possible next steps.
Last reviewed: 2026-07-18