Understanding your lab trend charts

Support CenterLab Results & Insights
Updated June 14, 2026· 2 min read

A single lab result tells you where a value sits right now. The Lab Insights trend charts show you where it's been — across every test you've received — so you can see whether things are improving, stable, or gradually moving in the wrong direction.

How trend charts work

Lab Insights automatically groups your results by test parameter (haemoglobin, cholesterol, HbA1c, etc.) across all the lab results in your account. Each parameter gets its own chart with one point per test, plotted in date order. The shaded band on each chart is the reference range, so you can see at a glance whether values are inside or outside normal bounds.

Reading the status indicators

  • Normal (green) — the latest value is within the reference range
  • Borderline (amber) — the latest value is close to the edge of the reference range
  • High / Low (orange) — the latest value is outside the reference range
  • Critical (red) — the latest value is significantly abnormal and needs clinical attention

What the abnormal count means

Each trend card shows an abnormal count — the number of results for that parameter that fell outside the reference range. A high abnormal count for a parameter suggests a persistent issue worth discussing with your doctor, even if the most recent reading looks normal.

Why a trend matters more than a single result

Reference ranges represent the middle 95% of a healthy population — 5% of perfectly healthy people will fall outside on any given test. A single borderline reading is often not clinically significant. A value that has moved steadily in one direction across four or five tests usually is. Always bring the trend context to your doctor, not just the most recent number. For more on interpreting individual lab values, see our patient's guide to reading lab results.

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