What a urine test checks and why doctors order it for older adults
A urine test, also called a urinalysis, looks for signs of infection, kidney disease, diabetes, and other conditions by examining what shows up in your urine under a microscope and through chemical testing. For older adults, doctors often order this test during annual checkups, when you report symptoms like pain during urination or frequent bathroom trips, or when managing chronic conditions like diabetes or high blood pressure.
The test is straightforward: you provide a urine sample in a cup at your doctor's office or lab, and the results come back within a few days. A urinalysis can catch problems early — before you feel sick — which matters more as you age because your body may not show obvious warning signs the way it did when you were younger.
Key Takeaways
- A urine test screens for urinary tract infections, kidney problems, diabetes, and blood in the urine, among other conditions.
- The test requires only a urine sample collected in a cup; no blood draw or invasive procedure is involved.
- Results typically return within a few days and show whether further testing or treatment is needed.
- Older adults may need this test more often because age-related changes can mask symptoms of serious conditions.
- Your doctor will explain what any abnormal result means and what step comes next.
What the test actually looks for
A urinalysis checks for several things at once. The lab looks for white blood cells and bacteria, which signal a urinary tract infection (UTI) — common in older adults and sometimes serious if left untreated. It measures glucose (sugar) in the urine, which can indicate diabetes or blood sugar control problems. It checks for protein, which may mean your kidneys are not filtering waste the way they should.
The test also looks for blood in the urine, which can come from kidney stones, bladder problems, or other conditions that need investigation. It measures pH (how acidic or alkaline your urine is), which can point to kidney disease or infection. The lab also notes the color and clarity of your sample — dark urine might mean dehydration, while cloudy urine often signals infection.
Some urinalysis tests also screen for nitrites and leukocyte esterase, both signs of bacterial infection. If your doctor suspects a specific condition — like diabetes or kidney disease — they may order a more detailed test that measures additional substances.
Why older adults get this test more often
As you age, your kidneys work less efficiently, and your body may not show the typical warning signs of infection or disease. A younger person with a UTI might feel burning during urination and know something is wrong. An older adult with the same infection might feel confused or tired instead — or feel nothing at all — while the infection silently damages the urinary tract or spreads to the bloodstream.
Doctors also order urinalysis more frequently for older adults taking medications that affect kidney function, such as blood pressure drugs or diabetes medications. If you have chronic kidney disease, diabetes, or heart disease, your doctor may want to check your urine once or twice a year to watch for changes. A routine urinalysis during an annual physical can catch problems before symptoms appear, which is especially important because treating early-stage kidney disease or infection is far simpler than treating advanced disease.
How to prepare and what to expect
You do not need to fast or avoid food before a urinalysis. On the day of your test, drink water normally — being well-hydrated makes it easier to provide a sample. When you arrive at the lab or doctor's office, you will be given a small cup and directed to a bathroom. The lab may ask you to collect a midstream sample, which means you start urinating, then catch the middle portion of the stream in the cup. This reduces contamination from bacteria on your skin.
Some labs ask you to clean the area around your urethra with a wipe before collecting the sample, especially if you are female. The staff will tell you exactly what to do. Once you provide the sample, you are done — there is no discomfort or risk involved. The lab then sends your sample to be analyzed, and your doctor receives the results within a few days.
If you are menstruating, let your doctor or lab staff know, because blood from your period can affect the results. In that case, the lab may ask you to reschedule or note the timing on your sample so the doctor can interpret the results correctly.
What abnormal results mean and what happens next
If your urinalysis shows bacteria and white blood cells, you likely have a urinary tract infection. Your doctor will probably prescribe an antibiotic and may order a urine culture — a test that identifies exactly which bacteria is causing the infection — so they can choose the most effective drug. Most UTIs in older adults clear up within a week or two of treatment, though some people need longer courses of antibiotics.
If the test shows protein or blood in your urine, your doctor may order additional tests to check how well your kidneys are working. This might include a blood test measuring creatinine and a calculation called the glomerular filtration rate (GFR), which tells your doctor how much kidney function you have. If results suggest kidney disease, your doctor will discuss treatment options and may refer you to a kidney specialist.
If glucose appears in your urine, your doctor will likely order a fasting blood sugar test or a test called hemoglobin A1C to check whether you have diabetes or prediabetes. If you already have diabetes, glucose in the urine may mean your blood sugar is not well controlled, and your doctor may adjust your medication or diet.
Not every abnormal result means something serious. Dehydration, strenuous exercise, or certain foods can cause temporary changes in urine. Your doctor will look at your symptoms, medical history, and other test results before deciding whether further testing or treatment is needed. If you do not understand your results, ask your doctor to explain them in plain language — it is your right to understand what your test found and what comes next.
When your doctor might order this test
Your doctor may order a urinalysis during a routine annual physical to screen for hidden problems. They will also order one if you report symptoms like pain or burning during urination, frequent urges to urinate, cloudy or bloody urine, or lower back or side pain. If you have diabetes, high blood pressure, or kidney disease, your doctor may order this test once or twice a year as part of managing your condition.
Some doctors order a urinalysis before surgery or before starting a new medication, to establish a baseline and make sure your kidneys and urinary system are working normally. If you fall and hit your lower back or side, or if you have unexplained fatigue or confusion, your doctor might order this test to rule out infection or kidney problems.
Questions to ask your doctor about your results
When you get your results, ask your doctor what each finding means in your specific situation. Ask whether the result requires treatment, further testing, or just monitoring. If your doctor recommends a follow-up test, ask when it should be done and whether you need to do anything differently to prepare. Ask whether any changes to your diet, medications, or habits might help — for example, drinking more water if you are prone to kidney stones, or taking antibiotics exactly as prescribed if you have an infection.
If your results are normal, ask your doctor how often you should have this test repeated. If you take multiple medications, ask whether any of them can affect your kidney function or urine results, so you understand what to watch for between visits.
Frequently Asked Questions
Can I drink coffee or tea before a urine test?
Yes. You do not need to fast or avoid caffeine before a urinalysis. Drink water normally to stay hydrated, which actually makes it easier to provide a sample. Avoid excessive alcohol the night before, as it can dehydrate you and affect your results.
What if I cannot provide a sample at the lab?
Tell the staff when ready. They can give you water to drink and let you wait a few minutes. If you still cannot produce a sample, you can reschedule for another day. Do not strain or force it — a small amount of urine is all the lab needs.
How long does it take to get results?
Most urinalysis results come back within two to three business days. Your doctor's office will contact you with the results, or you may be able to view them online through your patient portal. If results show signs of infection, your doctor may call sooner so treatment can start quickly.
Do I need to repeat the test if results are normal?
That depends on your age, health conditions, and medications. If you are generally healthy, a normal urinalysis during an annual physical may not need to be repeated for a year. If you have diabetes, kidney disease, or take medications that affect kidney function, your doctor may want to repeat it every six to twelve months.
What should I do if I have symptoms of a UTI but my urinalysis is normal?
Tell your doctor about your symptoms even if the test is normal. Sometimes a UTI is present but the bacteria count is low, or the infection is in the bladder rather than the urine. Your doctor may order a urine culture or examine you further to find the cause of your symptoms.