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Analyzing the Psychometric Properties of the Short Form-36 Quality of Life Questionnaire in Patients with Obesity

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Abstract

Purpose

The Short Form-36 (SF-36) questionnaire is a valuable and easy-to-use tool for the measurement of quality of life in patients with obesity. To become a widely used tool, the questionnaire must be validated in many different contexts. Thus, the present study aimed to evaluate the construct validity and reliability of the SF-36 questionnaire among patients with obesity in Bahrain.

Methodology

The 36-item questionnaire was administered to a study cohort scheduled to undergo bariatric surgery at the Bahrain Defence Force Hospital in Bahrain. Demographic data were extracted. Principal component analysis was used to extract component factors. Factor analysis was used to determine construct validity and fit. The Cronbach’s alpha value of the extracted factors was used to determine the internal consistency reliability. Statistical analyses were performed using SPSS version 19.0 and IBM AMOS version 22.0.

Results

Most of the participants were female with a mean body mass index (BMI) of 43.24 kg/m2. A six-factor solution explaining 52.31% of variance was generated. The global fit parameter estimates indicated that the suggested model exhibited an acceptable-to-good fit. Overall, the internal consistency reliability estimate of the SF-36 questionnaire was greater than 0.70.

Conclusion

The identified six-factor model of the SF-36 questionnaire is a valuable tool for the measurement of quality of life among patients with obesity in Bahrain.

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Author information

Authors and Affiliations

  1. Department of General Surgery, Bahrain Defence Force Hospital, P.O. Box 28743, Riffa, Kingdom of Bahrain

    Rashed Al Amer, Khalid Al Khalifa & Safeyah Ali Alajlan

  2. Medical Education, Training and Education Department, Bahrain Defence Force Hospital, P.O. Box 28743, Riffa, Kingdom of Bahrain

    Ahmed Al Ansari

Authors
  1. Rashed Al Amer
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  2. Khalid Al Khalifa
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  3. Safeyah Ali Alajlan
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  4. Ahmed Al Ansari
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Corresponding author

Correspondence to Ahmed Al Ansari.

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Conflict of Interest

The authors declare that they have no conflict of interest.

Informed Consent

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

Ethical Approval

The study proposal was approved by the Research and Research Ethics Committee of the BDF Hospital in Bahrain. All procedures performed in this study were in accordance with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Al Amer, R., Al Khalifa, K., Alajlan, S.A. et al. Analyzing the Psychometric Properties of the Short Form-36 Quality of Life Questionnaire in Patients with Obesity. OBES SURG 28, 2521–2527 (2018). https://doi.org/10.1007/s11695-018-3199-7

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  • DOI: https://doi.org/10.1007/s11695-018-3199-7

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