How to read the measurements in a discharge document
Two scores, the same instrument, the same rules — and what a difference between them does and does not prove.
A discharge document with numbers in it is better than one without. Reading it properly takes three checks.
Check the pair
Every score should appear twice: once at admission, once at discharge, with the instrument named both times. A single score is not a measurement of change.
Check that the same instrument was used at both points. A different scale at discharge makes the comparison meaningless however encouraging the number looks.
Check the scale
Know the range and the direction. On some instruments a higher score is better; on others it is worse. A number without its scale is not information.
Ask also whether the change exceeds what the instrument can reliably detect. Small movements on some scales are within measurement noise, and an honest report says so.
What it does not prove
A gain during a programme is not a promise that it will be kept. Retention depends on the home programme and the environment, which is why follow-up exists.
It also does not transfer between patients. Your neighbour’s result on the same scale after the same programme tells you nothing about yours.
Topic
More in Measurement and outcomes
- Which measurement instruments are used, and why thoseValidated scales for independence, balance, walking, tone and cognition — chosen by diagnosis rather than applied uniformly.
- What outcome numbers cannot tell youPublished success rates are usually uncheckable. Here is what makes a number meaningful and what makes it decoration.
