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Medicina (Kaunas). 2019 Nov 19;55(11). pii: E750. doi: 10.3390/medicina55110750.

Concurrent Validity of the Foot Health Status Questionnaire and Study Short Form 36 for Measuring the Health-Related Quality of Life in Patients with Foot Problems.

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University Center of Plasencia, Universidad de Extremadura, 10600 Plasencia, Spain.
Research, Health and Podiatry Group, Department of Health Sciences, Faculty of Nursing and Podiatry, Universidade da Coruña, 15403 Ferrol, Spain.
School of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain.
Faculty of Health Sciences. Universidad Rey Juan Carlos, 28922 Alcorcón, Spain.
Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Rey Juan Carlos University, La Paz Hospital Institute for Health Research, IdiPAZ, Grupo Multidisciplinar de Investigación y Tratamiento del Dolor, Grupo de Excelencia Investigadora URJC-Banco de Santander, 28922 Madrid, Spain.
Escola Superior de Saúde da Cruz Vermelha Portuguesa, 1300-125 Lisbon, Portugal.


Background and Objectives: Foot problems may be considered to be a prevalent condition and impact the health-related quality of life (QoL). Considering these Spanish-validated tools, the Foot Health Status questionnaire (FHSQ) may provide a health-related QoL measurement for specific foot conditions and general status. To date, the domains of the FHSQ and Medical Outcomes Study Short Form 36 (SF-36) have not been correlated. Therefore, the main aim of this study was to correlate the domains of the FHSQ and SF-36 in patients with foot problems. Materials and Methods: A cross-sectional descriptive study was carried out. A sample of 101 patients with foot problems was recruited. A single researcher collected descriptive data, and outcome measurements (FHSQ and SF-36) were self-reported. Results: Spearman's correlation coefficients (rs) were calculated and categorized as weak (rs = 0.00-0.40), moderate (rs = 0.41-0.69), or strong (rs = 0.70-1.00). In all analyses, statistical significance was considered with a p-value < 0.01 with a 99% confidence interval. Statistically significant differences (p < 0.01) were found between all domains of FHSQ and SF-36, except for the mental health domain of the SF-36 with foot pain, foot function, and general foot health of the FHSQ, as well as between the vitality domain of the SF-36 and the general foot health domain of the FHSQ (p > 0.01). Statistically significant correlations varied from week to strong (rs = 0.25-0.97). The strongest correlations (p < 0.001) were found for physical activity and physical function (rs = 0.94), vigor and vitality (rs = 0.89), social capacity and social function (rs = 0.97), and general health domains of the SF-36 and FHSQ. Conclusions: The FHSQ and SF-36 showed an adequate concurrent validity, especially for the physical activity or function, vigor or vitality, social capacity or function, and general health domains. Nevertheless, the mental health domain of the SF-36 should be considered with caution.


foot; foot deformities; foot diseases; musculoskeletal diseases; quality of life

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