Abstract
Objective: to psychometrically test the Brazilian version of the Treatment Satisfaction Questionnaire for Medication - TSQM (version 1.4), regarding ceiling and floor effect, practicability, acceptability, reliability and validity. Methods: participants with coronary heart disease (n=190) were recruited from an outpatient cardiology clinic at a university hospital in Southeastern Brazil and interviewed to evaluate their satisfaction with medication using the TSQM (version 1.4) and adherence using the Morisky Self-Reported Measure of Medication Adherence Scale and proportion of adherence. The Ceiling and Floor effect were analyzed considering the 15% worst and best possible TSQM scores; Practicability was assessed by time spent during TSQM interviews; Acceptability by proportion of unanswered items and participants who answered all items; Reliability through the Cronbach's alpha coefficient and Validity through the convergent construct validity between the TSQM and the adherence measures. Results: TSQM was easily applied. Ceiling effect was found in the side effects domain and floor effect in the side effects and global satisfaction domains. Evidence of reliability was close to satisfied in all domains. The convergent construct validity was partially supported. Conclusions: the Brazilian TSQM presents evidence of acceptability and practicability, although its validity was weakly supported and adequate internal consistency was observed for one domain.
Highlights
Satisfaction is a patient reported outcome that considers the patients’ evaluation of aspects of the medical treatment and health care systems[1]
While patient satisfaction with treatment includes the assessment of doctor-patient interaction, as well as other concomitant therapies, patient satisfaction with drug therapy is related only to medications[2]
The majority 112 (58.9%) of the participants was diagnosed with Acute Coronary Syndrome with STsegment elevation
Summary
Satisfaction is a patient reported outcome that considers the patients’ evaluation of aspects of the medical treatment and health care systems[1]. The interest in these types of measures has increased over the past decades, since patients have come to be considered as “consumers” and not just as passive receivers of health services[2]. Patients’ satisfaction with their medication has been demonstrated to predict the continuation on drug treatment, as well as adherence to correct and consistent use of drug therapy over time[3]. Among the factors that possibly influence the medication adherence construct, the patient satisfaction with drug therapy stands out[2]
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