Validation and Psychometrics of the Therapeutic Self-Care Scale for the Portuguese Population

Friday, 26 July 2013: 10:55 AM

Ana Filipa Cardoso, RN, MsC1
Paulo Queirós, PhD1
Carlos Fontes Ribeiro, PhD2
Fernando Amaral, RN, MsC3
(1)Department of Fundamental Nursing, Nursing School of Coimbra, Coimbra, Portugal
(2)Faculty of Medicine of University of Coimbra, Coimbra, Portugal

Learning Objective 1: The learner will be able to acknowledge the cultural validation process of the Therapeutic Self-care Scale for the Portuguese population.

Learning Objective 2: The learner will be able to know an instrument for assessing therapeutic self-care.

Purpose: To translate and validate the therapeutic self-care scale (TSC) for the Portuguese population

Methods: A cross-sectional study, in medical and surgical wards in 4 hospitals of the central region of Portugal.The following procedures were taken: authorization for the use of the instrument; panel of experts to assure the existence of a similar concept in Portugal; translation by two bilingual translators; panel of experts to build a consensus translation; back translation of the consensus form; analyses of the back translation by the previous translators; construct validation using factorial analyses after calculation of KMO and Bartlett's Test of Sphericity; reliability measured by α-Cronbach and inter-item correlation. An accidental sample was used, consisting of patients in medical and surgical wards- adults that were able to speak Portuguese, between March 2012 and July 2012. TSC is a 12 items scale score from 0 -5. TSC was administered by nurses in interview format, measuring the ability of the patient to perform 4 different categories of self-care activities.

Results: N= 990; mean age: 63.57 years old and std. deviation: 17.41. KMO= 0.948; Bartlett's Test of Sphericity: p<0,001. Factor analysis with eigenvalues> 1 and scree plot results in 1 factor which explains 81,318 of the variance. Reliability- α-Cronbach: 0.979 with correlation between each item and total score range from 0.861-0.937.  

Conclusion: Our results suggest that TSC is a valid instrument to use in the Portuguese population with a strong reliability (α-Cronbach: 0,979).