Lookup tables versus stacked rasch analysis in comparing pre- and postintervention adult strabismus-20 data

David A. Leske, Sarah R. Hatt, Laura Liebermann, Jonathan M Holmes

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Purpose: We compare two methods of analysis for Rasch scoring pre- to postintervention data: Rasch lookup table versus de novo stacked Rasch analysis using the Adult Strabismus-20 (AS-20). Methods: One hundred forty-seven subjects completed the AS-20 questionnaire prior to surgery and 6 weeks postoperatively. Subjects were classified 6 weeks postoperatively as “success,” “partial success,” or “failure” based on angle and diplopia status. Postoperative change in AS-20 scores was compared for all four AS-20 domains (self-perception, interactions, reading function, and general function) overall and by success status using two methods: (1) applying historical Rasch threshold measures from lookup tables and (2) performing a stacked de novo Rasch analysis. Change was assessed by analyzing effect size, improvement exceeding 95% limits of agreement (LOA), and score distributions. Results: Effect sizes were similar for all AS-20 domains whether obtained from lookup tables or stacked analysis. Similar proportions exceeded 95% LOAs using lookup tables versus stacked analysis. Improvement in median score was observed for all AS20 domains using lookup tables and stacked analysis (P, 0.0001 for all comparisons). Conclusions: The Rasch-scored AS-20 is a responsive and valid instrument designed to measure strabismus-specific health-related quality of life. When analyzing pre- to postoperative change in AS-20 scores, Rasch lookup tables and de novo stacked Rasch analysis yield essentially the same results. Translational Relevance: We describe a practical application of lookup tables, allowing the clinician or researcher to score the Rasch-calibrated AS-20 questionnaire without specialized software.

Original languageEnglish (US)
Article number11
JournalTranslational Vision Science and Technology
Volume5
Issue number1
DOIs
StatePublished - Jan 1 2016

Fingerprint

Table lookup
Strabismus
Surgery
Diplopia
Self Concept
Health
Reading
Software
Quality of Life
Research Personnel

Keywords

  • Patient reported outcomes
  • Quality of life
  • Rasch
  • Strabismus
  • Surgery

ASJC Scopus subject areas

  • Ophthalmology
  • Biomedical Engineering

Cite this

Lookup tables versus stacked rasch analysis in comparing pre- and postintervention adult strabismus-20 data. / Leske, David A.; Hatt, Sarah R.; Liebermann, Laura; Holmes, Jonathan M.

In: Translational Vision Science and Technology, Vol. 5, No. 1, 11, 01.01.2016.

Research output: Contribution to journalArticle

@article{9c577218a11c405bb373d11c84930c55,
title = "Lookup tables versus stacked rasch analysis in comparing pre- and postintervention adult strabismus-20 data",
abstract = "Purpose: We compare two methods of analysis for Rasch scoring pre- to postintervention data: Rasch lookup table versus de novo stacked Rasch analysis using the Adult Strabismus-20 (AS-20). Methods: One hundred forty-seven subjects completed the AS-20 questionnaire prior to surgery and 6 weeks postoperatively. Subjects were classified 6 weeks postoperatively as “success,” “partial success,” or “failure” based on angle and diplopia status. Postoperative change in AS-20 scores was compared for all four AS-20 domains (self-perception, interactions, reading function, and general function) overall and by success status using two methods: (1) applying historical Rasch threshold measures from lookup tables and (2) performing a stacked de novo Rasch analysis. Change was assessed by analyzing effect size, improvement exceeding 95{\%} limits of agreement (LOA), and score distributions. Results: Effect sizes were similar for all AS-20 domains whether obtained from lookup tables or stacked analysis. Similar proportions exceeded 95{\%} LOAs using lookup tables versus stacked analysis. Improvement in median score was observed for all AS20 domains using lookup tables and stacked analysis (P, 0.0001 for all comparisons). Conclusions: The Rasch-scored AS-20 is a responsive and valid instrument designed to measure strabismus-specific health-related quality of life. When analyzing pre- to postoperative change in AS-20 scores, Rasch lookup tables and de novo stacked Rasch analysis yield essentially the same results. Translational Relevance: We describe a practical application of lookup tables, allowing the clinician or researcher to score the Rasch-calibrated AS-20 questionnaire without specialized software.",
keywords = "Patient reported outcomes, Quality of life, Rasch, Strabismus, Surgery",
author = "Leske, {David A.} and Hatt, {Sarah R.} and Laura Liebermann and Holmes, {Jonathan M}",
year = "2016",
month = "1",
day = "1",
doi = "10.1167/tvst.5.1.11",
language = "English (US)",
volume = "5",
journal = "Translational Vision Science and Technology",
issn = "2164-2591",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "1",

}

TY - JOUR

T1 - Lookup tables versus stacked rasch analysis in comparing pre- and postintervention adult strabismus-20 data

AU - Leske, David A.

AU - Hatt, Sarah R.

AU - Liebermann, Laura

AU - Holmes, Jonathan M

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Purpose: We compare two methods of analysis for Rasch scoring pre- to postintervention data: Rasch lookup table versus de novo stacked Rasch analysis using the Adult Strabismus-20 (AS-20). Methods: One hundred forty-seven subjects completed the AS-20 questionnaire prior to surgery and 6 weeks postoperatively. Subjects were classified 6 weeks postoperatively as “success,” “partial success,” or “failure” based on angle and diplopia status. Postoperative change in AS-20 scores was compared for all four AS-20 domains (self-perception, interactions, reading function, and general function) overall and by success status using two methods: (1) applying historical Rasch threshold measures from lookup tables and (2) performing a stacked de novo Rasch analysis. Change was assessed by analyzing effect size, improvement exceeding 95% limits of agreement (LOA), and score distributions. Results: Effect sizes were similar for all AS-20 domains whether obtained from lookup tables or stacked analysis. Similar proportions exceeded 95% LOAs using lookup tables versus stacked analysis. Improvement in median score was observed for all AS20 domains using lookup tables and stacked analysis (P, 0.0001 for all comparisons). Conclusions: The Rasch-scored AS-20 is a responsive and valid instrument designed to measure strabismus-specific health-related quality of life. When analyzing pre- to postoperative change in AS-20 scores, Rasch lookup tables and de novo stacked Rasch analysis yield essentially the same results. Translational Relevance: We describe a practical application of lookup tables, allowing the clinician or researcher to score the Rasch-calibrated AS-20 questionnaire without specialized software.

AB - Purpose: We compare two methods of analysis for Rasch scoring pre- to postintervention data: Rasch lookup table versus de novo stacked Rasch analysis using the Adult Strabismus-20 (AS-20). Methods: One hundred forty-seven subjects completed the AS-20 questionnaire prior to surgery and 6 weeks postoperatively. Subjects were classified 6 weeks postoperatively as “success,” “partial success,” or “failure” based on angle and diplopia status. Postoperative change in AS-20 scores was compared for all four AS-20 domains (self-perception, interactions, reading function, and general function) overall and by success status using two methods: (1) applying historical Rasch threshold measures from lookup tables and (2) performing a stacked de novo Rasch analysis. Change was assessed by analyzing effect size, improvement exceeding 95% limits of agreement (LOA), and score distributions. Results: Effect sizes were similar for all AS-20 domains whether obtained from lookup tables or stacked analysis. Similar proportions exceeded 95% LOAs using lookup tables versus stacked analysis. Improvement in median score was observed for all AS20 domains using lookup tables and stacked analysis (P, 0.0001 for all comparisons). Conclusions: The Rasch-scored AS-20 is a responsive and valid instrument designed to measure strabismus-specific health-related quality of life. When analyzing pre- to postoperative change in AS-20 scores, Rasch lookup tables and de novo stacked Rasch analysis yield essentially the same results. Translational Relevance: We describe a practical application of lookup tables, allowing the clinician or researcher to score the Rasch-calibrated AS-20 questionnaire without specialized software.

KW - Patient reported outcomes

KW - Quality of life

KW - Rasch

KW - Strabismus

KW - Surgery

UR - http://www.scopus.com/inward/record.url?scp=85042809961&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042809961&partnerID=8YFLogxK

U2 - 10.1167/tvst.5.1.11

DO - 10.1167/tvst.5.1.11

M3 - Article

VL - 5

JO - Translational Vision Science and Technology

JF - Translational Vision Science and Technology

SN - 2164-2591

IS - 1

M1 - 11

ER -