What Does a High or Low IGF-1 Result Mean?
A high or low IGF-1 result can reflect growth hormone activity, but interpretation depends on age, sex, symptoms, lab method, and follow-up testing.
Lab Results
What Does a High or Low Quantitative hCG Result Mean?
A quantitative hCG blood test measures the amount of pregnancy hormone in your blood. Learn what high, low, borderline, rising, or falling results can mean and when to seek urgent care.
What Does a High or Low Pregnancy hCG Result Mean?
A high or low hCG blood test result can mean different things depending on timing, gestational age, symptoms, and whether the level is rising or falling. Learn how quantitative hCG is interpreted and when follow-up matters.
What Does a High or Low CMV Result Mean?
CMV blood test results can be confusing because “high” or “low” may refer to IgG antibodies, IgM antibodies, IgG avidity, or CMV DNA viral load. Learn what common CMV result patterns usually mean, when follow-up testing is needed, and what to discuss with a clinician.
What Does a High or Low Hepatitis C Result Mean?
Hepatitis C results are usually interpreted as reactive/nonreactive and RNA detected/not detected—not simply high or low. Learn what each result means and what to do next.
What Does a High or Low CCP Antibodies Result Mean?
High CCP antibodies can strongly support rheumatoid arthritis when symptoms and exam findings fit. Low or negative CCP antibodies make RA less likely but do not rule it out.
What Does a High or Low Rheumatoid Factor Result Mean?
A high rheumatoid factor can support rheumatoid arthritis or Sjögren syndrome, but it is not diagnostic by itself. A low or negative result usually means little or no RF is detected, but it does not fully rule out inflammatory arthritis.
What Does a High or Low ANA Result Mean?
A high or low ANA result can be confusing because ANA is usually reported as negative, positive, and sometimes as a titer and pattern. Learn what the result can and cannot tell you.
What Does a High or Low CRP Result Mean?
A high CRP result usually means inflammation is present somewhere in the body, while a low CRP is generally normal. Learn how to interpret CRP and hs-CRP results, what can raise or lower them, and what to ask your clinician next.
What Does a High or Low ESR Result Mean?
An ESR, or sed rate, is a nonspecific blood test that can rise with inflammation, infection, autoimmune disease, kidney disease, pregnancy, aging, anemia, and some cancers. Low ESR is usually less clinically important but can occur with certain red blood cell or protein changes. Here’s how to interpret high and low ESR results in context.