Therapeutic inertia and contributing factors among ambulatory patients with hypertension

Background: Therapeutic inertia refers to the failure of healthcare providers to initiate or intensify therapy based on current evidence-based guidelines, even when the desired treatment goal is not achieved. Despite poorly controlled hypertension, clinicians often hesitate to intensify treatment. Therapeutic inertia is currently receiving more attention as a significant reason for clinicians' inability to effectively manage hypertension. However, in our setting, there is limited knowledge about therapeutic inertia and its contributing factors.

Objectives: The aim of this study was to investigate therapeutic inertia and contributing factors among ambulatory patients with hypertension.

Method: A prospective observational study was conducted at the cardiac clinic of Ayder comprehensive specialized hospital in the Tigray region of northern Ethiopia. Patients were recruited into the study during their medication refilling appointments using a simple random sampling technique. All patients were followed for a minimum of 6 months to assess therapeutic inertia, which was defined as the healthcare providers' failure to initiate or intensify therapy based on current evidence-based guidelines when therapeutic goals were not achieved. Data were collected through patient interviews and review of their medical records. We utilized binary logistic regression analysis to determine factors associated with therapeutic inertia.

Result: The study included 282 participants, with an equal male-to-female ratio. The mean age of the participants was 56.6 ± 12.3 years. Among all participants, a majority (67.4%) had uncontrolled hypertension. The study revealed that 72% of patients with uncontrolled hypertension experienced therapeutic inertia. In response to this issue, we recommended dose escalation for 73% of the patients and the initiation of additional drug therapy for 27% of them. Multivariable analysis indicated that having three or more medications (AOR = 4.74, 95%CI = 1.94-11.61) and having stage II hypertension (AOR = 3.06, 95%CI = 1.32-7.08) were identified as independent predictors of therapeutic inertia.

Conclusion: The findings of our study indicated that a large proportion of the patients had poorly controlled hypertension, and a significant number of these patients also demonstrated therapeutic inertia. The number of medications and stage II hypertension were identified as independent predictors of therapeutic inertia. Therefore, it is crucial to prioritize patients at risk of therapeutic inertia and provide them with additional support. Moreover, practice based training should be given to clinicians in order to enhance treatment intensification and overall treatment outcome among ambulatory patients with hypertension.