Skip to main content. Create new account Request new password. You are here 2c - Diagnosis and Screening. Screening tests are not diagnostic tests The primary purpose of screening tests is to detect early disease or risk factors for disease in large numbers of apparently healthy individuals.
Some of the key differences are tabled below: Table 3. More weight given to accuracy and precision than to patient acceptability Positive result Essentially indicates suspicion of disease often used in combination with other risk factors that warrants confirmation Result provides a definite diagnosis Cost Cheap, benefits should justify the costs since large numbers of people will need to be screened to identify a small number of potential cases Higher costs associated with diagnostic test maybe justified to establish diagnosis.
Navigation Principles, methods, applications and organisation of screening for early detection, prevention, treatment and control of disease Differences between screening and diagnostic tests and case finding Statistical aspects of screening tests, including knowledge of and ability to calculate, sensitivity, specificity, positive and negative predictive values, and the use of ROC curves Likelihood ratios Pre- and post-test probability Ethical economic, legal and social aspects of screening The principles of informed choice Planning, operation and evaluation of screening programmes The evidence basis needed for developing screening policies and implementing screening programmes, including established programmes such as breast and cervix and those currently in development, being piloted or subject to major research activity Ethical, social and legal implications of a genetic screening test.
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If you don't have insurance, you can still get important screening tests. Find a health center near you to learn more. Get Screened. Topic navigation Browse Sections Overview. The Basics: Overview Screenings are medical tests that doctors use to check for diseases and health conditions before there are any signs or symptoms.
Depending on your age, sex, and medical history, you may need to be screened tested for things like: Certain types of cancer High blood pressure or high cholesterol Diabetes Osteoporosis or weak bones STDs sexually transmitted diseases Mental health conditions, like depression What happens during a screening? Take Action: Get Ready Talk with your doctor or nurse about which screening tests are right for you.
Find out which screenings you may need. Make a list of questions to ask your doctor. When you visit the doctor, it helps to write down your questions ahead of time. Check out these questions for the doctor about screenings for: Breast cancer Colorectal cancer HIV Hepatitis C Lung cancer Prostate cancer You can also use this tool to build your own list of questions for the doctor. Ask your doctor about the risks and benefits.
Your doctor can help you decide if the benefits of the screening outweigh the risks for you. Make sure you get the results from every screening. This not only conserves tests, it saves the family money.
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