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LETTER TO EDITOR
Year : 2019  |  Volume : 26  |  Issue : 2  |  Page : 144  

Correlates of physical disability in the elderly population of rural North India (Haryana)


Department of Community Medicine, School of Public Health, PGIMER, Chandigarh, India

Date of Web Publication29-Apr-2019

Correspondence Address:
Dr. Md A Bashar
R. No. 125, School of Public Health, PGIMER, Chandigarh - 160 012
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jfcm.JFCM_210_18

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How to cite this article:
Bashar MA. Correlates of physical disability in the elderly population of rural North India (Haryana). J Fam Community Med 2019;26:144

How to cite this URL:
Bashar MA. Correlates of physical disability in the elderly population of rural North India (Haryana). J Fam Community Med [serial online] 2019 [cited 2019 Nov 15];26:144. Available from: http://www.jfcmonline.com/text.asp?2019/26/2/144/257311

Sir,

I read with great interest the article by Khan et al. titled, “Correlates of physical disability in the elderly population of a rural population of North India.”[1] However, certain issues undermine the validity of the study findings:

First, the authors arrived at the requisite sample size by taking the relative precision as 20%, which is too high and hence erroneous. Most authors recommend a relative precision of 5% if prevalence of the disease/condition is expected to be between 10% and 90%.[2]

Second, the authors used the Barthel index together with Katz index to assess physical disability in the study population and defined physical disability as needing help in one or more of the activities of daily living activities included in the index. However, the Barthel index is an ordinal scale with scores ranging from 0–2 to 0–3 for each of the 10 items totaling 0–20.[3] The authors should have mentioned the cutoff score for classifying an elderly person as physically disabled as per the scoring system rather than rely on subjective assessment.

These issues should be considered when the validity of the study findings is examined.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

 
   References Top

1.
Khan ZA, Singh C, Khan T. Correlates of physical disability in the elderly population of rural North India (Haryana). J Family Community Med 2018;25:199-204.  Back to cited text no. 1
    
2.
Pourhoseingholi MA, Vahedi M, Rahimzadeh M. Sample size calculation in medical studies. Gastroenterol Hepatol Bed Bench 2013;6:14-7.  Back to cited text no. 2
    
3.
Barthel Index of Activities of Daily Living. Available from: http://www.camapcanada.ca/Barthel.pdf. [Last accessed on 2018 Nov 21].  Back to cited text no. 3
    




 

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Journal of Family and Community Medicine | Published by Wolters Kluwer - Medknow
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