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The validity and reliability of Thai Sinonasal Outcome Test-22

  • Rhinology
  • Published:
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Abstract

Chronic rhinosinusitis (CRS) symptoms can significantly reduce quality of life. The Sinonasal Outcome Test-22 (SNOT-22) is frequently used to assess this disease-specific quality of life, although it has not been translated into Thai language. We translated the original SNOT-22 questionnaire to Thai using forward–backward technique, and validated it in CRS patients [n = 229, mean age of 52.6 (SD = 15.9)] recruited at outpatient Otolaryngology clinic, Faculty of Medicine Ramathibodi Hospital, Bangkok, Thailand. A construct validity was assessed using factor analysis, reliability was assessed using intra-class correlation coefficient (ICC) after 3 days of taking the first questionnaire, and internal consistency was assessed using Cronbach’s alpha. A total of 201 out of 229 patients completed SNOT-22 questionnaire. Factor analysis with oblique rotation was applied and yielded three domains with eigenvalue of 1 or higher. These domains were named as nasal-related, ear–general–psychological, and sleep-related domains. Estimated ICC ranged from 0.49 to 0.71 with a median of 0.64, and Cronbach’s alpha was 0.94. The Thai SNOT-22 questionnaire is reliable and valid with three domains. Thai SNOT-22 may be used in research and clinical practice to assess disease-specific quality of life and aid in management plan at CRS clinic.

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Acknowledgments

This manuscript is an important part of the training of Dr. Pawin Numthavaj who is a Ph.D. student in Clinical Epidemiology in the Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok Thailand. We thank Mr. Stephen Pinder, Mr. Neill deHaan, and Mrs. Pornpayong Numthavaj Koga for the translation of SNOT-22 questionnaire.

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Authors and Affiliations

  1. Section for Clinical Epidemiology and Biostatistics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand

    Pawin Numthavaj, Atiporn Ingsathit & Ammarin Thakkinstian

  2. Department of Otolaryngology, Faculty of Medicine Ramathibodi Hospital, 270 Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand

    Thongchai Bhongmakapat & Boonsarm Roongpuwabaht

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  1. Pawin Numthavaj
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  2. Thongchai Bhongmakapat
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  3. Boonsarm Roongpuwabaht
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  4. Atiporn Ingsathit
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  5. Ammarin Thakkinstian
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Corresponding author

Correspondence to Thongchai Bhongmakapat.

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Funding

This study was funded by Mahidol University.

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The authors declare that they have no conflict of interest.

Research involving human participants

All procedures performed in this study were in accordance with ethical standards of institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards (Faculty of Medicine Ramathibodi Hospital Ethical Clearance No. MURA2014/95).

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Informed consent was obtained from all individual participants included in the study.

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Numthavaj, P., Bhongmakapat, T., Roongpuwabaht, B. et al. The validity and reliability of Thai Sinonasal Outcome Test-22. Eur Arch Otorhinolaryngol 274, 289–295 (2017). https://doi.org/10.1007/s00405-016-4234-8

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  • DOI: https://doi.org/10.1007/s00405-016-4234-8

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