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ORIGINAL ARTICLE
Year : 2021  |  Volume : 5  |  Issue : 2  |  Page : 57-66

Psychometric analysis of the Bengali Version of the Sino-Nasal outcome Test-20 questionnaire in patients suffering from chronic rhino-sinusitis: A cross-sectional study


1 Department of Materia Medica, National Institute of Homoeopathy, Under Ministry of AYUSH, Government of India, Howrah, West Bengal, India
2 Department of Repertory, National Institute of Homoeopathy, Under Ministry of AYUSH, Government of India, Howrah, West Bengal, India
3 Department of Homoeopathic Pharmacy, National Institute of Homoeopathy, Under Ministry of AYUSH, Government of India, Howrah, West Bengal, India
4 Department of Practice of Medicine, Mahesh Bhattacharyya Homoeopathic Medical College and Hospital, Government of West Bengal, Howrah, West Bengal, India
5 Department of Organon of Medicine and Homoeopathic Philosophy, State National Homoeopathic Medical College and Hospital, Government of Uttar Pradesh, Lucknow, Uttar Pradesh, India
6 Department of Repertory, D. N. De Homoeopathic Medical College and Hospital, Govt. of West Bengal, Kolkata, West Bengal, India

Correspondence Address:
Dr. Pankhuri Misra
Department of Materia Medica, National Institute of Homoeopathy, Under Ministry of AYUSH, Government of India, Block GE, Sector III, Salt Lake, Kolkata - 700 106, West Bengal
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/aiao.aiao_2_21

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Introduction: The Sino-nasal outcome test-20 (SNOT-20) questionnaire contains 20 items provided with a 6-point Likert scale and are aimed at measuring rhino-sinusitis specific and general symptoms; however, no Bengali version is available. Aims and Objectives: We aimed to develop SNOT-20 Bengali version (SNOT-20-B) and examine its cross-cultural adaptability considering linguistic equivalence in patients suffering from chronic rhino-sinusitis. Materials and Methods: A cross-sectional study was conducted on 270 patients by consecutive sampling at the ear-nose-throat outpatient of National Institute of Homoeopathy, Kolkata. The SNOT-20-B was produced by standardized forward-backward translations. Construct validity was examined by the exploratory factor analysis (n = 150) using the principal component analysis (varimax rotation). Subsequently, confirmatory factor analysis (CFA; n = 120) was performed to verify model fit. Concurrent validity was checked by correlating SNOT-20-B score with simultaneously measured EQ-5D-5 L scores. Observations and Results: Internal consistency (Cronbach's α =0.860; 95% confidence interval 0.834, 0.883) and test-retest reliability (P > 0.05) both were satisfactory. Concurrent validity was agreeable (P = 0.007). In factor analysis, all the items loaded above pre-specified value of 0.4 and identified 6 components, explaining 67.8% of variation. The goodness-of-fit in the CFA model was acceptable (χ2 = 517.396, P < 0.001; Comparative Fit Index = 0.634, Tucker Lewis Index = 0.551, root mean square error of approximation = 0.140, standardized root mean square residual = 0.298). Conclusions: SNOT-20-B, consisting of 20 items and framed within six components, appeared to be a valid and reliable questionnaire but measured different dimensions from the English version.


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