diabetic-utils

diabetic-utils

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diabetic-utils / glucoseStandardDeviation

Function: glucoseStandardDeviation()

glucoseStandardDeviation(readings): number

Defined in: variability.ts:23

Calculates the unbiased sample standard deviation (SD) of glucose values. Uses n-1 in the denominator (sample SD), as recommended in clinical research and guidelines.

Parameters

readings

number[]

Array of glucose values (numbers)

Returns

number

Standard deviation, or NaN if fewer than 2 values

Throws

If readings is not an array

See

• ADA 2019: Glycemic Targets
• ISPAD 2019

Example

glucoseStandardDeviation([100, 120, 140]) // 20
glucoseStandardDeviation([]) // NaN

Remarks

• If readings contains <2 values, returns NaN (not enough data for SD).
• Handles NaN/Infinity values by propagating them in the result.

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