Validity and reliability of the Malay version of the Hill-Bone compliance to high blood pressure therapy scale for use in primary healthcare settings in Malaysia: A cross-sectional study
- Author:
Cheong AT
;
Tong SF
;
Sazlina S
- Publication Type:Journal Article
- Keywords:
Validity;
reliability;
medication adherence;
hypertension
- From:Malaysian Family Physician
2015;10(2):36-44
- CountryMalaysia
- Language:English
-
Abstract:
Introduction: Hill-Bone compliance to high blood pressure therapy scale (HBTS) is one of
the useful scales in primary care settings. It has been tested in America, Africa and Turkey with
variable validity and reliability. The aim of this paper was to determine the validity and reliability
of the Malay version of HBTS (HBTS-M) for the Malaysian population.
Materials and methods: HBTS comprises three subscales assessing compliance to medication,
appointment and salt intake. The content validity of HBTS to the local population was agreed
through consensus of expert panel. The 14 items used in the HBTS were adapted to reflect
the local situations. It was translated into Malay and then back-translated into English. The
translated version was piloted in 30 participants. This was followed by structural and predictive
validity, and internal consistency testing in 262 patients with hypertension, who were on antihypertensive
agent(s) for at least 1 year in two primary healthcare clinics in Kuala Lumpur,
Malaysia. Exploratory factor analyses and the correlation between HBTS-M total score and
blood pressure were performed. The Cronbach’s alpha was calculated accordingly.
Results: Factor analysis revealed a three-component structure represented by two components
on medication adherence and one on salt intake adherence. The Kaiser–Meyer–Olkin statistic
was 0.764. The variance explained by each factors were 23.6%, 10.4% and 9.8%, respectively.
However, the internal consistency for each component was suboptimal with Cronbach’s alpha of
0.64, 0.55 and 0.29, respectively. Although there were two components representing medication
adherence, the theoretical concepts underlying each concept cannot be differentiated. In
addition, there was no correlation between the HBTS-M total score and blood pressure.
Conclusion: HBTS-M did not conform to the structural and predictive validity of the original
scale. Its reliability on assessing medication and salt intake adherence would most probably to be
suboptimal in the Malaysian primary care setting.
- Full text:P020160307822299650690.pdf
