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The 6-item CTS symptoms scale: a brief outcomes measure for carpal tunnel syndrome.

Atroshi, Isam LU ; Lyrén, Per-Erik and Gummesson, Christina LU (2009) In Quality of Life Research 18. p.347-358
Abstract
OBJECTIVE: To develop a psychometrically appropriate brief symptoms measure of carpal tunnel syndrome (CTS). METHODS: Preoperative CTS 11-item symptom severity and 8-item functional status scales from 693 patients (71% women) with CTS were subjected to exploratory factor analysis and item response theory (IRT) analysis yielding a revised CTS symptoms scale. A validation sample of 213 patients (68% women) with CTS completed the 11-item disabilities of the arm, shoulder and hand (QuickDASH), and the revised symptoms scale and 116 patients also completed the original CTS symptom severity scale (median interval 11 days). RESULTS: Of the 11 CTS symptom severity scale items, 2 items that on factor analysis associated with the functional status... (More)
OBJECTIVE: To develop a psychometrically appropriate brief symptoms measure of carpal tunnel syndrome (CTS). METHODS: Preoperative CTS 11-item symptom severity and 8-item functional status scales from 693 patients (71% women) with CTS were subjected to exploratory factor analysis and item response theory (IRT) analysis yielding a revised CTS symptoms scale. A validation sample of 213 patients (68% women) with CTS completed the 11-item disabilities of the arm, shoulder and hand (QuickDASH), and the revised symptoms scale and 116 patients also completed the original CTS symptom severity scale (median interval 11 days). RESULTS: Of the 11 CTS symptom severity scale items, 2 items that on factor analysis associated with the functional status items were removed. After IRT recalibrations of the remaining symptom severity scale items, 2 non-fitting items were removed and 2 items were merged creating the 6-item CTS symptoms scale. Factor analysis showed one dominant factor explaining 58% of the variance. Reliability was high (Cronbach alpha = 0.86; IRT person separation reliability = 0.88). No item displayed significant differential item functioning. The 6-item CTS symptoms scale showed strong correlation with the QuickDASH (r = 0.70) and agreement with the original symptom severity scale (ICC = 0.80). CONCLUSION: The 6-item CTS symptoms scale has good reliability and validity and can be used to measure symptom severity and treatment outcome in CTS. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
Quality of Life Research
volume
18
pages
347 - 358
publisher
Springer
external identifiers
  • wos:000264266400007
  • pmid:19229657
  • scopus:62349132456
  • pmid:19229657
ISSN
1573-2649
DOI
10.1007/s11136-009-9449-3
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Division of Physiotherapy (Closed 2012) (013042000), Department of Orthopaedics (Lund) (013028000)
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1ab86e51-e37a-4a4f-98ca-af70355d99cb (old id 1302383)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/19229657?dopt=Abstract
date added to LUP
2016-04-04 09:31:18
date last changed
2022-01-29 18:16:21
@article{1ab86e51-e37a-4a4f-98ca-af70355d99cb,
  abstract     = {{OBJECTIVE: To develop a psychometrically appropriate brief symptoms measure of carpal tunnel syndrome (CTS). METHODS: Preoperative CTS 11-item symptom severity and 8-item functional status scales from 693 patients (71% women) with CTS were subjected to exploratory factor analysis and item response theory (IRT) analysis yielding a revised CTS symptoms scale. A validation sample of 213 patients (68% women) with CTS completed the 11-item disabilities of the arm, shoulder and hand (QuickDASH), and the revised symptoms scale and 116 patients also completed the original CTS symptom severity scale (median interval 11 days). RESULTS: Of the 11 CTS symptom severity scale items, 2 items that on factor analysis associated with the functional status items were removed. After IRT recalibrations of the remaining symptom severity scale items, 2 non-fitting items were removed and 2 items were merged creating the 6-item CTS symptoms scale. Factor analysis showed one dominant factor explaining 58% of the variance. Reliability was high (Cronbach alpha = 0.86; IRT person separation reliability = 0.88). No item displayed significant differential item functioning. The 6-item CTS symptoms scale showed strong correlation with the QuickDASH (r = 0.70) and agreement with the original symptom severity scale (ICC = 0.80). CONCLUSION: The 6-item CTS symptoms scale has good reliability and validity and can be used to measure symptom severity and treatment outcome in CTS.}},
  author       = {{Atroshi, Isam and Lyrén, Per-Erik and Gummesson, Christina}},
  issn         = {{1573-2649}},
  language     = {{eng}},
  pages        = {{347--358}},
  publisher    = {{Springer}},
  series       = {{Quality of Life Research}},
  title        = {{The 6-item CTS symptoms scale: a brief outcomes measure for carpal tunnel syndrome.}},
  url          = {{http://dx.doi.org/10.1007/s11136-009-9449-3}},
  doi          = {{10.1007/s11136-009-9449-3}},
  volume       = {{18}},
  year         = {{2009}},
}