17 Screening Tests Adults Should Ask Their Doctor About
9. Thyroid Function Testing - Balancing Your Body's Metabolic Engine
Thyroid function testing plays a crucial role in detecting thyroid disorders that can significantly impact metabolism, energy levels, weight management, and overall health. The thyroid gland produces hormones that regulate numerous bodily functions, and both overactive (hyperthyroidism) and underactive (hypothyroidism) thyroid conditions can cause serious health problems if left untreated. The American Thyroid Association recommends thyroid screening for adults starting at age 35 and every five years thereafter, though individuals with symptoms or risk factors may need more frequent testing. The primary screening test measures thyroid-stimulating hormone (TSH) levels in the blood, which provides an excellent indicator of thyroid function. When TSH levels are abnormal, additional tests measuring free thyroxine (T4) and sometimes triiodothyronine (T3) help provide a complete picture of thyroid status. Hypothyroidism, more common in women and older adults, can cause fatigue, weight gain, depression, cold intolerance, and cognitive difficulties, while hyperthyroidism can lead to weight loss, anxiety, rapid heartbeat, and heat intolerance. Both conditions can have subtle, gradual onset, making screening particularly important for early detection. Thyroid disorders are highly treatable when diagnosed properly, with hypothyroidism typically managed through hormone replacement therapy and hyperthyroidism treated through medications, radioactive iodine, or surgery depending on the underlying cause. Regular thyroid screening is especially important for women of childbearing age, as thyroid disorders can affect fertility and pregnancy outcomes. Early detection and treatment of thyroid problems can restore normal metabolism and prevent serious complications affecting the heart, bones, and other organ systems.
10. Kidney Function Assessment - Protecting Your Body's Filtration System
Kidney function testing serves as an essential screening tool for detecting chronic kidney disease, which affects millions of adults and often progresses silently until significant kidney damage has occurred. The National Kidney Foundation recommends that adults at increased risk, including those with diabetes, high blood pressure, family history of kidney disease, or age over 60, undergo regular kidney function screening. The primary screening tests include serum creatinine measurement with estimated glomerular filtration rate (eGFR) calculation and urinalysis to detect protein or blood in the urine. The eGFR provides an estimate of how well the kidneys are filtering waste from the blood, with values below 60 mL/min/1.73m² for three months or longer indicating chronic kidney disease. Urinalysis can detect proteinuria (excess protein in urine), which often represents early kidney damage before changes in eGFR become apparent. Additional tests may include blood urea nitrogen (BUN) and albumin-to-creatinine ratio for more comprehensive kidney function assessment. Chronic kidney disease often develops gradually without obvious symptoms, making screening particularly important for early detection and intervention. Risk factors include diabetes, hypertension, cardiovascular disease, obesity, smoking, and certain medications that can damage kidney function over time. Early detection through regular screening enables implementation of strategies to slow disease progression, including blood pressure control, diabetes management, dietary modifications, and avoidance of kidney-toxic substances. Advanced kidney disease can lead to the need for dialysis or kidney transplantation, making early intervention crucial for preserving kidney function and preventing progression to end-stage renal disease. Regular monitoring also helps healthcare providers adjust medications and treatments to protect remaining kidney function.
