Vol 3, No 2 (2018)
Original article
Published online: 2018-07-31
Validation of the Functioning in Chronic Illness Scale (FCIS)
Medical Research Journal 2018;3(2):63-69.
Abstract
Diagnosis of deficient areas in the functioning of patient with chronic disease is necessary to undertake
the adequate therapeutic actions. The aim of the study was to validate a new self-reported questionnaire
for patients with chronic disease assessing the impact of the disease on the patient, the patient’s impact
on the disease and the impact of the disease on patient’s attitudes.
Results: The internal consistency of the questionnaire expressed by a-Cronbach coefficient = 0.855, indicates
its high reliability and homogeneity. The set of 24 items fulfilled the assumption of factor analysis:
the determinant of correlation matrix was 0.001, Kaiser-Mayer-Olkin (K-M-O) statistic was 0.843 and the
Bartlett’ test of sphericity was statistically significant. The factor analysis was conducted using the principal
component analysis with Varimax rotation. The scale and subscale levels were determined based on the
percentiles scale.
Conclusion: The validation procedure revealed that FCIS is a reliable and homogeneous tool to measure
patient’s physical and mental functioning in the chronic illness. The set of items divided into 3 subscales
allows evaluation of: the impact of the disease on the patient, the patient’s impact on the disease and the
impact of the disease on the patient’s attitudes.
Keywords: validationchronic illnessscale
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