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Body mass index

Body mass index (clinical table).
Name in the dataset bmi
Type clinical
Stored in clinical_data.csv
Unit kg/m2

Measurement space

-0.200.2true minus recorded (kg/m2)1. recorded 21.1 kg/m2density-101true minus recorded (kg/m2)2. recorded 25.9 kg/m2density-0.200.2true minus recorded (kg/m2)3. recorded 25.8 kg/m2density-101true minus recorded (kg/m2)4. recorded 23.7 kg/m2density

Vertical slices through the measurement space: how the true value is spread around a recorded one, for 4 recorded values chosen to show the different cases. Each panel has its own scale. Each is averaged over every record with that value in the release, from the pinned model; groups of fewer than 20 records are not shown.

  1. 21.1 kg/m2 (the commonest recorded value; 87 records): mean -0.00218 kg/m2, SD 0.0623 kg/m2, 95% between -0.0893 and +0.0667. Rounding: weight / (height/100)^2 100%.
  2. 25.9 kg/m2 (the widest; 38 records): mean -0.0145 kg/m2, SD 0.206 kg/m2, 95% between -0.25 and +0.111. Rounding: weight / (height/100)^2 100%.
  3. 25.8 kg/m2 (the narrowest; 56 records): mean +0.00542 kg/m2, SD 0.0358 kg/m2, 95% between -0.068 and +0.0615. Rounding: weight / (height/100)^2 100%.
  4. 23.7 kg/m2 (unlike the others; 67 records): mean +0.00637 kg/m2, SD 0.113 kg/m2, 95% between -0.114 and +0.119. Rounding: weight / (height/100)^2 100%.
Joint map of recorded against true value for Body mass index
Joint map: across, the recorded value; up, the true value minus the recorded one. Colour is the share of all probability in the release (6,388 records), on a log scale. Each column is a slice like those above; tall columns are values people round to, narrow ones values written as measured.

Time

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

Value
Model kind derived: computed from other variables' posteriors
Resolution derived from height, weight
Status measured
Studies Body mass index, derived from its inputs

Derived from

Computed from Height and Weight.

In this release

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

Median p10 to p90
Standard deviation 0.0142 kg/m2 0.0109 to 0.062 kg/m2
95% interval width 0.0543 kg/m2 0.0411 to 0.308 kg/m2
Mean minus recorded 0.00175 kg/m2 -0.0406 to 0.0418 kg/m2

Value model

Model file: …/models/bmi.model.json. Read from the pinned snapshot of vitaldb-resolution at commit bb03ddfc8a (2026-10-18).
Recorded resolution 0.1 (nearest), as stored
Covariates sex, age, emop, department
  • Derived: weight / (height/100)^2

Studies

Study Date Status Summary
Body mass index, derived from its inputs 2026-10-18 current Body mass index computed from the posteriors of height, weight.

Figures

Histogram of the recorded values of bmi.
Recorded values in the release: 6,388 records, median 23.1 kg/m2; 61 outside the 0.5–99.5th percentiles are not shown.

Tags: generated, vitaldb-resolution