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Trend alerts automatically scan your lab history and surface patterns worth paying attention to in Labs, marker details, and the dashboard’s Needs Attention widget. You do not need to configure anything — detection runs every time you load or update your data.

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How alerts are triggered

getbased uses two independent methods to detect problems:

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Sudden change

Compares your most recent result to the one before it. If the jump is larger than 25% of the reference range width and the latest value is outside its effective range, getbased raises a sudden change alert. That latest range can be laboratory, personal, phase-specific, context-aware, or built-in.

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Linear regression (trend)

Looks at three or more results over time and fits a trend line. If the slope is steep enough and the fit is statistically consistent, getbased raises a trend alert. This catches slow drifts that would be easy to miss when looking at individual results one at a time. A trend alert also fires when a marker is approaching the boundary of its reference range — within 15% of the limit — even if it is still technically normal.
Trend detection requires at least three data points for a marker. Import multiple lab results across different dates to get the most value from this feature.

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Alert types and colors

Sudden change alerts take priority over regression alerts for the same marker. A marker will appear in at most one alert type at a time.

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Critical flags

getbased also lists critical flags — markers where the latest value has crossed more than 50% of the reference range width past the boundary. These are not trend detections. They flag markers that are significantly out of range right now, regardless of whether the trend is worsening or stable. Markers that appear in trend alerts are excluded from the critical flags section to avoid showing the same marker twice.

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Date range filter

All trend detection respects the date range filter set in the header. If you narrow the range to the last six months, only results within that window are analyzed. This is useful for evaluating whether a specific intervention improved a marker over a defined period.
Trend alerts and critical flags are informational tools to help you spot patterns in your own data. They are not medical diagnoses. Always discuss significant changes with a qualified healthcare provider.
See Understand lab ranges and calculated markers for how the effective range is selected and why some results remain unrated.