The scenario is very familiar: you open your blood test results, and a number jumps out. It is bold, sometimes marked with a star, just above or below the indicated interval. From there to imagining an illness, there is only one step.
Yet, a result outside the reference values is not, in itself, a diagnosis. It deserves interpretation, with the right context. The challenge is therefore twofold: not to panic in the face of an isolated anomaly, but not to brush it aside without medical advice.
Why might a result go out of scope?
On an analysis report, the laboratory generally indicates reference values. They serve as a benchmark to situate your result. But they are not universal: Health Insurance points out that they can vary in particular depending on dosing techniques, gender and age.
This is an important first nuance. A figure found on the Internet, in an old document or in another person’s report does not always directly compare to yours. The units can also differ, which completely changes the reading of a result.
A slight deviation is therefore not necessarily enough to conclude that a disease is present. Conversely, it would be unwise to decide alone that an abnormal result is unimportant. The meaning of a test depends on what was measured, the extent of the deviation, your possible symptoms, your history, your treatments and the reason why the test was ordered.
What to check before you worry?
Before looking for a random explanation, a few simple reflexes can help you avoid frequent reading errors.
- Reread the references from your own laboratory. These are the ones that must serve as the starting point, with the unity displayed on the report;
- Bring out your previous results. An evolution over time can be more telling than an isolated figure. When possible, Health Insurance advises carrying out examinations in the same laboratory to facilitate comparisons;
- Note your treatments and the sampling conditions. Many medications can change certain dosages. Depending on the analysis, the fact of having eaten, smoked, practiced intense physical activity or respected the instructions given can also count.
Another point often a source of confusion: not all blood tests require fasting. The good reflex is to ask the laboratory or professional who prescribed the test for instructions. And above all, never modify a treatment to “bring” a figure into the normunless medically indicated.
Who can tell you if this number really matters?
The biological report is only part of the assessment. The prescriber links the results to your clinical situation: fatigue, monitoring of a chronic illness, monitoring of a treatment, assessment before an intervention, screening, etc. It is this intersection between the figures and your state of health that gives meaning to the analysis.
The medical biologist also has an important role: he validates and interprets the biological results, and can explain the units, reference values or sampling conditions. If a result worries you, the right questions to ask are concrete: Is this difference significant? should it be controlled? How soon should the prescriber be seen again?
If the laboratory asks you to contact a doctor quickly, follow this instruction without delay. If no emergency is reported, this does not replace the advice of the prescriber: ask him how soon to reread the result, without concluding alone that there is no problem.
A bold star or number attracts attention, but it doesn’t tell the whole story. The useful follow-up often comes down to a very simple detail: arriving at the appointment with the full report, your old analyzes if you have any, and the list of your current treatments.