The Importance of Screening
Early identification of risk factors and disease can create opportunities for earlier intervention, more effective treatment and better long-term health outcomes.
Why Screening Matters
Many significant medical conditions can develop quietly or initially present with symptoms that are easily attributed to other causes.
Health screening provides an opportunity to look for important risk factors and early indicators of disease before they result in more serious health problems.
Earlier detection can create more opportunities for intervention. Identifying a condition or an important risk factor at an earlier stage may allow appropriate investigation, treatment and risk-reducing strategies to begin sooner.
At Knightsbridge Doctors, screening is considered in the context of the individual. Your medical history, family history, symptoms, lifestyle and personal risk factors all help determine which investigations may be appropriate.
Screening for Endocrine Disorders in Primary Care
Many endocrine, or hormonal, disorders have a significant delay between the time of initial presentation to a physician and diagnosis.
This delay can occur because endocrine conditions may initially present with vague or non-specific symptoms which can be attributed to non-endocrine conditions.
Symptoms and Signs Seen in Primary Care
Common symptoms or signs of endocrine disorders encountered in primary care can include:
- Mood and cognitive changes
- Elevated blood pressure
- Elevated blood sugar
- Headache
- Menstrual irregularities
- Loss of libido and erectile dysfunction
- Changes in body hair
- Electrolyte disturbances
- Disruption of thermoregulation
- Changes in bone mineral density
- Fatigue
The Aim of Screening
The aim of a screening programme is to help reduce the delay in diagnosing endocrine disorders and identify abnormalities that may warrant further investigation.
Common endocrine conditions include diabetes or pre-diabetes, thyroid disorders, raised blood calcium, low bone density and reproductive disorders. Rarer diagnoses include pituitary and adrenal disorders.
Cardiac Screening in Primary Care
Cardiovascular disease can develop before obvious symptoms become apparent. Screening can help identify certain abnormalities and risk factors that may benefit from further assessment or treatment.
Atrial Fibrillation
The most common heart arrhythmia is Atrial Fibrillation (AF). It can be detected by clinical examination and an ECG, or heart tracing. In some cases more detailed cardiac investigations may be required.
Once detected, atrial fibrillation can be managed to reduce the risk of harmful medical events.
The estimated prevalence of atrial fibrillation in adults.
Atrial fibrillation can increase the risk of stroke five-fold, depending on additional risk factors.
Atrial fibrillation accounts for an estimated 20–30% of all ischaemic strokes.
The European Society of Cardiology reports that the lifetime risk of developing atrial fibrillation for people of European descent at the age of 55 years is approximately 37%, although individual risk depends on age, genetics and other clinical factors.
The prevalence of AF progressively increases with age, and lifetime risk is higher in men than in women.
Unfortunately, approximately 25% of atrial fibrillation diagnoses are made when a person presents with a stroke. The irregular rhythm associated with AF can contribute to the formation of a blood clot within the heart, which may then travel through the circulation and block a blood vessel in the brain.
Atrial fibrillation can also precipitate or exacerbate heart failure. Around 20–30% of people with AF are affected by heart failure or left ventricular dysfunction due to excessive ventricular rate and/or irregular ventricular contractions.
Health Risks Associated with Atrial Fibrillation
A large meta-analysis by Odutayo and colleagues in 2016, involving 104 cohort studies and 587,867 people with atrial fibrillation, reported associations with:
- 46% increase in all-cause mortality
- 61% higher risk of ischaemic heart disease
- 64% higher risk of chronic kidney disease
- 88% higher risk of sudden cardiac death
- 96% higher risk of a major cardiovascular event
- Two-fold increase in cardiovascular mortality
- 2.3-fold increased risk of stroke
- Five-fold increased risk of heart failure, representing the highest absolute risk increase amongst the outcomes studied
Screening for Coronary Heart Disease
Coronary Heart Disease involves narrowing of one or more of the coronary arteries by plaque within their walls.
Risk can be assessed through discussion with your doctor, clinical examination and investigations such as an ECG. In appropriate circumstances, a CT scan of the coronary arteries may also be considered.
Effective strategies are available to reduce cardiovascular risk where relevant risk factors are identified.
The most serious manifestation of coronary heart disease is a myocardial infarction, or heart attack, in which heart muscle is damaged because of insufficient oxygen supply.
A heart attack is commonly caused by blockage of a coronary artery by a thrombus, or clot, arising after an atherosclerotic plaque ruptures or erodes.
Coronary Heart Disease in the UK
The British Heart Foundation estimates that:
Approximately 68,000 deaths each year are attributed to coronary heart disease.
Around 2.3 million people in the UK are living with coronary heart disease.
Around 100,000 UK hospital admissions each year are due to heart attack.
Those approximately 100,000 hospital admissions equate to around 290 admissions every day, or one approximately every five minutes.
Around 1.4 million people in the UK are estimated to have survived a heart attack, including around one million men and 380,000 women.
Screening for Lung Cancer in Primary Care
Lung cancer remains one of the most prevalent and deadliest cancers in the UK.
Approximately 49,200 new cases are diagnosed each year, equating to more than 130 new cases each day. It is responsible for around 35,000 deaths annually, making it a leading cause of cancer-related mortality.
One of the greatest challenges in lung cancer management is late-stage diagnosis, which can severely limit treatment options and survival.
Approximately 75% of lung cancers in the UK are diagnosed at stage III or IV, when curative treatment may no longer be possible. The five-year survival rate is approximately 16%, whereas outcomes are considerably better when disease is detected earlier.
The Role of Screening in Early Detection
Lung cancer is often asymptomatic during its early stages, making proactive identification particularly important for those considered at increased risk.
The Targeted Lung Health Check Programme has helped detect lung cancer earlier, diagnosing more than 5,000 cases since its launch. Approximately 75% of these cancers were identified at stage I or II, when treatment can be considerably more effective.
When a tumour is diagnosed at less than 10mm in size, the cure rate with surgical resection exceeds 92%.
If a tumour grows beyond 30mm or involves lymph nodes, cure rates fall below 60%.
When lung cancer has spread to distant organs, five-year survival falls below 10%.
The earlier lung cancer is detected, the greater the opportunity for potentially curative treatment.
Advances in Robotic Bronchoscopy
New technologies such as robotic-assisted bronchoscopy are transforming the investigation of small or difficult-to-reach lung nodules by enabling precise, minimally invasive biopsy.
This technology can allow clinicians to access and biopsy nodules as small as approximately 5mm, including some nodules located in areas of the lung that have historically been difficult to reach.
By improving diagnostic accuracy and facilitating earlier investigation, robotic bronchoscopy may help reduce the time to diagnosis and treatment.
The Future of Early Detection
As technology develops, combining advanced bronchoscopy with approaches such as liquid biopsy and AI-supported imaging analysis may further enhance early diagnosis and personalised treatment strategies.
Lung cancer remains a major health challenge, with late-stage diagnosis contributing significantly to poor outcomes. Expanded screening programmes and advances in diagnostic technology provide increasingly effective opportunities to detect disease at an earlier, more treatable stage.
Prevention Starts with Understanding Your Risk
Screening is not simply about undergoing as many tests as possible. Effective screening is about identifying which investigations are appropriate for your age, medical history, family history, lifestyle and individual risk factors.
Our experienced GPs can discuss your personal health risks and tailor an assessment to your individual circumstances.
Our health screening service is designed to look beyond today and help you make informed decisions about your future health.