Record Details

Assessment of Physical Function in Health and Disease (Floor and Ceiling)

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

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Title Assessment of Physical Function in Health and Disease (Floor and Ceiling)
 
Identifier https://doi.org/10.7910/DVN/ISQWQW
 
Creator Eswar Krishnan
 
Publisher Harvard Dataverse
 
Description Objective
The objective of the current study was to improve the assessment of physical function by improving the precision of assessment at the floor (extremely poor function) and at the ceiling (extremely good health) of the health continuum.

Methods
Under the NIH PROMIS program, we developed new physical function floor and ceiling items to supplement the existing item bank. Using item response theory (IRT) and the standard PROMIS methodology, we developed 30 floor items and 26 ceiling items and administered them during a 12-month prospective observational study of 737 individuals at the extremes of health status. Change over time was compared across anchor instruments and across items by means of effect sizes. Using the observed changes in scores, we back-calculated sample size requirements for the new and comparison measures.

Results
We studied 444 subjects with chronic illness and/or extreme age, and 293 generally fit subjects including athletes in training. IRT analyses confirmed that the new floor and ceiling items outperformed reference items (p
 
Subject Medicine, Health and Life Sciences
 
Contributor Shen, Shu-En