PROMs

Hip disability and Osteoarthritis Outcome Score-Physical function Short form (HOOS-PS) Flow

Hip Disability and Osteoarthritis Outcome Score-Physical function Short form flow

Introduction

The Hip disability and Osteoarthritis Outcome Score (HOOS) – Physical Function Shortform (HOOS-PS)-Control was developed from the original long version using Rasch analysis. The Rasch analysis resulted in a 5 item questionnaire that is cross culturally valid and that provides a true interval level measure such that it can be used to measure change in physical function. The reliability of the 5 items is 0.80 (Cronbach’s alpha). It is a unidimensional construct as demonstrated by the fit to the Rasch model [1].

The Hip Disability and Osteoarthritis Outcome Score-Physical function Short form flow contains the Hip disability and Osteoarthritis Outcome Score-Physical function Short form (HOOS-PS) questionnaire and associated calculation. after form submission, the Hip Disability and Osteoarthritis Outcome Score-Physical function Short form calculation is executed automatically. It's easy to extend this flow with conditional logic based on the interpretation of the Hip Disability and Osteoarthritis Outcome Score-Physical function Short form calculation.

Hip disability and Osteoarthritis Outcome Score-Physical function Short form (HOOS-PS) questionnaire

Questions and Scoring

All five items are coded from 0 to 4, none to extreme respectively.

Questions:

  • Descending stairs
  • Getting in/out of bath or shower
  • Sitting
  • Running
  • Twisting/pivoting on your loaded leg

Interpretation

HOOS-PS can be scored in two directions:

  1. From no difficulty (0) to extreme difficulty (100), as in the original HOOS-PS publication [2]
  2. From extreme difficulty (0) to no difficulty (100) in accordance with HOOS.

The method of interpretation used in Awell is according to direction #2 (0 = extreme difficulty and 100 = no difficulty).

Nomogram for converting raw summed HOOS-PS scores to 0 representing extreme difficulty and 100 representing no difficulty:

References

[1] HOOS-PS User’s Guide. http://www.koos.nu/hoospsusers.html \
[2] Davis AM et al. 2008, Osteoarthritis Cartilage

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