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Preoperative Na

Preoperative Na (clinical table).

Name in the dataset preop_na
Type clinical
Stored in clinical_data.csv
Unit mmol/L

Description

Pre-operative copy of a lab result; behaves like the lab data.

Measurement space

-0.500.5true minus recorded (mmol/L)density

A vertical slice through the measurement space: how the true value is spread around any one recorded value. Its shape is uniform.

Time

This variable carries no time of its own in the dataset.

Value

Model kind uniform: single resolution; uniform over the rounding interval
Resolution 1 mmol/L, nearest
Native step 1 mmol/L
Anchor nearest (convention)

In this release

How wide the true-value distribution is, record by record, over 5,765 of 6,388 records (all clinical rows) that have one. Computed with the pinned model, aggregates only.

Median p10 to p90
Standard deviation 0.289 mmol/L 0.289 to 0.289 mmol/L
95% interval width 0.95 mmol/L 0.95 to 0.95 mmol/L
Mean minus recorded 0 mmol/L 0 to 0 mmol/L

Anchor

Laboratory results rounded to the last reported digit; at most half the last digit. See what an anchor is and every variable's anchor.

Figures

Histogram of the recorded values of preop_na.
Recorded values in the release: 5,765 records, median 140 mmol/L; 46 outside the 0.5–99.5th percentiles are not shown.

Tags: generated, vitaldb-resolution