Explorando la validez de constructo del índice de Barthel en una muestra de pacientes hospitalizados españoles

Abstract

Objective

Examine the construct validity of the Barthel Index in adult inpatient units.

Methods

A secondary analysis was performed on a sample of 1342 adult patients admitted to inpatient units. A confirmatory factor analysis of the Barthel Index did not confirm its unidimensional structure (CFA-1). Therefore, two methods were explored to find a solution with a better fit. The sequence of the classical exploratory and confirmatory factor analysis methods was carried out (CFA-2). In contrast, a Gaussian graphical model and confirmatory factor analysis (CFA-3) were performed. Three models were compared on the basis of several goodness-of-fit indicators.

Results

CFA-1 results (χ² = 161616; P < .001; RMSEA = .183) indicated a poor fit between the model and the data. Exploratory factor analysis provided a model with two dimensions that explained 86% of the variance and improved the goodness-of-fit in CFA-2 (χ² = 846; P < .001; RMSEA = .133). The Gaussian graphical model, by removing the item ‘Bladder’, offered a solution with three dimensions that improved the goodness-of-fit compared to the previous models (χ² = 492; P < .001; RMSEA = .09).

Conclusions

The Barthel Index is not a unidimensional measure of functional capacity when applied to adult inpatient units. The best-fitting model has a three-dimensional structure (Hygiene; Feeding and disposal; Mobility) that relates to the domains of care needs.