A comparison of Rasch with Likert scoring to discriminate between patients' evaluations of total hip replacement surgery

R. Fitzpatrick*, J. M. Norquist, C. Jenkinson, B. C. Reeves, R. W. Morris, D. W. Murray, P. J. Gregg

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

31 Citations (Scopus)

Abstract

The purpose of this study was to examine whether there are advantages in terms of outcome assessment of using Rasch methods of scoring the 12-item Oxford Hip Score (OHS) questionnaire over conventionally Likert scores. As part of a prospective cohort study of total hip replacements in five former regions of England the OHS was sent to patients pre-operatively, at 3 months and 1 year post-operatively. Post-operative data was collected on over 5000 cases. Based on the level of satisfaction with surgery, patients were divided into satisfied and dissatisfied. Analyses were performed to test the relative precision (RP) of Rasch scoring vs. conventionally Likert scores in discriminating the groups experiencing different level of satisfaction. Considerable gains in precision were achieved with Rasch scoring methods when groups were compared 3 and 12 months post-operatively. The results from the current study suggest that in some situations there may be substantial gains in measuring health related outcomes using Rasch-based scoring methods.

Original languageEnglish
Pages (from-to)331-338
Number of pages8
JournalQuality of Life Research
Volume13
Issue number2
DOIs
Publication statusPublished - 1 Mar 2004

Structured keywords

  • BTC (Bristol Trials Centre)
  • Centre for Surgical Research

Keywords

  • Hip replacement surgery
  • Outcomes
  • Rasch measurement

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