Validity and Reliability of the Treatment Adherence Questionnaire for Patients with Hypertension.
Natalia Esquivel Garzón, Luz Patricia Díaz Heredia
PMID 31830407WHAT IT FOUND
A Spanish questionnaire for adults with primary hypertension appears usable to assess medication and lifestyle adherence.
It was tested in 220 Colombian adults and does not show that adherence improves health.
Key findings
01The questionnaire was judged understandable and accurate by 20 patients and four experts, with agreement values of 0.68 for comprehension, 0.76 for clarity, and 0.64 for accuracy.
02In 220 patients with primary hypertension, the 28-item version reported internal consistency of 0.74.
03The six-factor structure was retained, but items regrouped, and the six factors explained 54.5% of variance.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The main validation used 220 convenience patients from one urban municipality in Colombia, so it may not apply to rural areas or other regions. Patients with secondary hypertension or diabetes were excluded, so the results do not cover those groups. Adherence was self-reported, and the paper reports validity and reliability, not treatment outcomes. The six-factor structure was forced from the original instrument, items regrouped, and the factors explained only 54.5% of variance. Face and content validity relied on 20 patients and four experts, which is a small group.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not read this as proof that using the questionnaire improves adherence or blood pressure. It is a questionnaire validation study in one urban Colombian sample, not a treatment trial.