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Part 1: Document Description
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Citation |
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Title: |
Assessment of Physical Function in Health and Disease (Floor and Ceiling) |
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Identification Number: |
doi:10.7910/DVN/UDMFYV |
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Distributor: |
Harvard Dataverse |
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Date of Distribution: |
2021-06-17 |
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Version: |
1 |
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Bibliographic Citation: |
Krishnan, Eswar, 2021, "Assessment of Physical Function in Health and Disease (Floor and Ceiling)", https://doi.org/10.7910/DVN/UDMFYV, Harvard Dataverse, V1, UNF:6:A8eS41nDQaDtD5oOUxByow== [fileUNF] |
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Citation |
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Title: |
Assessment of Physical Function in Health and Disease (Floor and Ceiling) |
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Identification Number: |
doi:10.7910/DVN/UDMFYV |
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Authoring Entity: |
Krishnan, Eswar (Stanford University) |
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Distributor: |
Harvard Dataverse |
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Access Authority: |
Shen, Shu-En |
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Depositor: |
Shen, Shu-En |
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Date of Deposit: |
2021-06-17 |
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Holdings Information: |
https://doi.org/10.7910/DVN/UDMFYV |
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Study Scope |
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Keywords: |
Medicine, Health and Life Sciences |
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Abstract: |
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. 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. 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<0.001). The estimated post-hoc sample size requirements were reduced by a factor of two to four at the floor and a factor of two at the ceiling. Extending the range of physical function measurement can substantially improve measurement quality, can reduce sample size requirements and improve research efficiency. The paradigm shift from Disability to Physical Function includes the entire spectrum of physical function, signals improvement in the conceptual base of outcome assessment, and may be transformative as medical goals more closely approach societal goals for health. |
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Methodology and Processing |
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Sources Statement |
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Data Access |
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Notes: |
<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a> |
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Other Study Description Materials |
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Related Publications |
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Citation |
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Title: |
Fries JF, Lingala B, Siemons L, et al. Extending the floor and the ceiling for assessment of physical function. Arthritis Rheumatol. 2014;66(5):1378-1387. doi:10.1002/art.38342 |
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Bibliographic Citation: |
Fries JF, Lingala B, Siemons L, et al. Extending the floor and the ceiling for assessment of physical function. Arthritis Rheumatol. 2014;66(5):1378-1387. doi:10.1002/art.38342 |
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File Description--f4807702 |
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File: Stanford data dictionary.tab |
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Notes: |
UNF:6:A8eS41nDQaDtD5oOUxByow== |
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List of Variables: |
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Variables |
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f4807702 Location: |
Variable Format: character Notes: UNF:6:zVTab53frvuBk/1q7L4UaQ== |
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f4807702 Location: |
Variable Format: character Notes: UNF:6:fltP8Z9mWwWsiHEPBcBdcg== |
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f4807702 Location: |
Variable Format: character Notes: UNF:6:iR7GwdFQkWAULXOOUIAkig== |
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Label: |
neg1_may2014.sas7bdat |
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Text: |
Floor Items (one year apart) |
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Notes: |
application/x-sas-data |
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Label: |
neg2_may2014.sas7bdat |
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Text: |
Floor Items (one year apart) |
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Notes: |
application/x-sas-data |
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Label: |
pos1_may2014.sas7bdat |
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Text: |
Ceiling Items (one year apart) |
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Notes: |
application/x-sas-data |
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Label: |
pos2_may2014.sas7bdat |
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Text: |
Ceiling Items (one year apart) |
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Notes: |
application/x-sas-data |