Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Nov;33(11):3487-3493.
doi: 10.1007/s11695-023-06841-7. Epub 2023 Oct 6.

Reliability of the DSS-Swe Questionnaire

Anders Jans  1 , Eva Rask  2 , Johan Ottosson  3 , Anders Magnuson  4 , Eva Szabo  3 , Erik Stenberg  3
Affiliations

Reliability of the DSS-Swe Questionnaire

Anders Jans et al. Obes Surg. 2023 Nov.

Abstract

Background: Symptomatic postbariatric hypoglycemia (PBH) is a known complication that can occur a few years after Roux-en-Y gastric bypass (RYGB). There is currently no established rating scale for PBH-associated symptoms developed for use in Swedish populations. The aim of the study was to translate an already existing questionnaire into Swedish and to test its reliability.

Methods: The study included forward and backward translations of the original Dumping Severity Scale (DSS) questionnaire with 8 items regarding symptoms of early dumping and 6 items regarding hypoglycemia, with each item graded on a 4-point Likert scale. The reliability of the Swedish translated questionnaire (DSS-Swe) was estimated using internal consistency and test-retest methods.

Results: A total of 200 patients were included in the study. Good internal consistency was demonstrated regarding the items related to early dumping symptoms, with a Cronbach's alpha coefficient of 0.82, and very good agreement in terms of test-retest reliability, with an overall intraclass correlation coefficient (ICC) of 0.91 (95% CI 0.88-0.93). The items related to hypoglycemia yielded a good Cronbach's alpha coefficient of 0.76 and an ICC of 0.89 (95% CI 0.85-0.91).

Conclusion: The DSS-Swe questionnaire shows good reliability regarding both internal consistency and test-retest performance for use in Swedish populations.

Keywords: Bariatric surgery; Hypoglycemia; Questionnaire; Reliability test; Translation.

PubMed Disclaimer

Conflict of interest statement

J.O. has participated in the advisory board for Novo Nordisk without personal financial compensation. E.St. has received lecturing fees from Johnson & Johnson Medical and consulting fees from the Swedish National Board of Health and Welfare. None of the remaining authors declares any conflict of interest.

Figures

Fig. 1
Fig. 1
Study flowchart describing availability for analyses regarding first part (items Q1–Q8) and second part (items Q9–Q14) of the DSS-Swe
Fig. 2
Fig. 2
Bland–Altman plot describing relation between mean total and difference in total score for items 1–8 per study participant
See this image and copyright information in PMC

References

    1. NCD Risk Factor Collaboration (NCD-RisC) Trends in adult body-mass index in 200 countries from 1975 to 2014: a pooled analysis of 1698 population-based measurement studies with 19·2 million participants. Lancet. 1975;2016(387):1377–1396. - PMC - PubMed
    1. Ng M, Fleming T, Robinson M, et al. Global, regional, and national prevalence of overweight and obesity in children and adults during 1980–2013: a systematic analysis for the Global Burden of Disease Study 2013. Lancet. 2014;384:766–781. doi: 10.1016/S0140-6736(14)60460-8. - DOI - PMC - PubMed
    1. Williams EP, Mesidor M, Winters K, et al. Overweight and obesity: prevalence, consequences, and causes of a growing public health problem. Curr Obes Rep. 2015;4:363–370. doi: 10.1007/s13679-015-0169-4. - DOI - PubMed
    1. Adams KF, Schatzkin A, Harris TB, et al. Overweight, obesity, and mortality in a large prospective cohort of persons 50 to 71 years old. N Engl J Med. 2006;355:763–778. doi: 10.1056/NEJMoa055643. - DOI - PubMed
    1. Sjöström L. Review of the key results from the Swedish Obese Subjects (SOS) trial - a prospective controlled intervention study of bariatric surgery. J Intern Med. 2013;273:219–234. doi: 10.1111/joim.12012. - DOI - PubMed

Publication types