The Most Accurate Lab Tests in Mohali — Why External Quality Validation Matters

Blood test results are only as useful as they are accurate. In India, most labs — including many in hospitals — run tests without independent external verification. They calibrate their machines against themselves, using their own standards. This creates a blind spot: if the machine drifts, the standards drift with it, and nobody notices.

Gini's lab participates in External Quality Assessment (EQA) — our samples are sent blind to an international reference laboratory every month. They test the same samples independently. Our results are compared against international reference values. Any deviation triggers investigation and correction before it affects patient reports.

This is how laboratory quality should work. Most labs in North India don't do it.

The most-asked question: "Why does my HbA1c show 6.1% at one lab and 6.4% at another?"

The honest answer involves several layers:

1. Different instruments. Roche, Abbott, Beckman Coulter, Siemens — each manufacturer's analyser uses different chemistry, different reagents, and produces slightly different results for the same sample. Differences of 5–10% are normal.

2. Different reagent kits. Even within the same manufacturer, reagent batches vary. Lab quality controls catch large drifts; small variations are unavoidable.

3. Different calibration populations. Reference ranges are derived statistically from a "reference population" — usually 200–500 healthy adults. Labs in India often use ranges calibrated on Western populations because that's what the analyser ships with. Indian-specific calibration matters for several tests (TSH, Vitamin D, lipid profile).

4. Different internal QC thresholds. Two labs may both pass internal QC but with different acceptable variation, leading to different output.

What this means for you:

• Always use the same lab for serial monitoring (HbA1c trends, thyroid trends, kidney trends).
• Focus on the trend of your numbers over time, not a single reading.
• If you must compare results from two labs, ask both labs for their reference range — not just whether your number is "normal."
• Borderline results should be discussed with a doctor, not interpreted from the lab report alone.

Gini prints the actual reference range used on every report, so you and your doctor can interpret the result correctly. Read the full ranges explainer →