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Development and evaluation of 'neck pain and functional limitation scale': a validation study in the Asian context
Joseph Henry Leonard1, Chan Poh Choo, Mohd Rizal Abdul Manaf
1Physiotherapy Program, Faculty of Allied Health Sciences, Kuala Lumpur, Malaysia. leonardjoseph85@hotmail.com
Background:
There is a paucity of literature on validated outcome measurement tools for evaluation of neck pain and related disability in the Asian context.
Aim:
The main aim of the present study was to design a new tool called neck pain functional limitation scale (NPFLS) for measuring disability related to neck pain and observe its reliability, concurrent validity and criterion validity.
Setting And Design:
This study was performed at the institutional hospital.
Materials And Methods:
A total of 157 subjects (neck pain group) and 25 control subjects (control group) without neck pain were recruited for this study. NPFLS was framed as a new tool for this study, which consisted of 5 domains - pain intensity, activities of daily living, social activities, functional activities and psychological factors. Neck Bournemouth questionnaire (NBQ) was used as a gold standard to measure the concurrent validity and criterion validity of the NPFLS.
Statistical Analysis:
Criterion validity and concurrent validity between the neck Bournemouth questionnaire (NBQ) and NPFLS scores were tested statistically using Mann-Whitney U test and Spearman correlation test. The reliability was tested by examining the internal consistency to calculate the Cronbach's alpha value for each item in NPFLS.
Results:
No significant difference between NPFLS and NBQ was observed using Mann-Whitney U Test, with P value greater than 0.05 (P= 0.557). Besides that, NPFLS had a high concurrent validity (r= 0.916) and good internal consistency with high Cronbach's alpha value of (r= 0.948), which demonstrated strong correlation between the items of NPFLS and NBQ.
Conclusion:
NPFLS demonstrated good reliability, high concurrent validity and criterion validity in this study. NPFLS can be used to assess neck pain and disability among patients with neck pain.
