Impact of sociodemographic patient factors on prescriber adherence to antihypertensive prescription guidelines: a cross-sectional study using data from The Irish Longitudinal Study on Ageing
Authors: Akhtar A , Burton E , Bermingham M , Kearney P M 
Published: April 2024

Abstract

Introduction
Uncontrolled hypertension causes significant morbidity and mortality worldwide. Several international prescribing guidelines have been created to address this. However, prescriber adherence to these guidelines may be influenced by sociodemographic patient factors such as socio-economic status, gender and age.

Aim
To examine the effects of gender and other patient factors, including age, geographical location, educational attainment, duration of disease, socio-economic status, smoking status, and previous history of cardiovascular diseases on prescriber adherence to hypertension prescription guidelines. Achievement of blood pressure goals (&lt;140/90 mmHg) with adherence to prescription guidelines was also assessed.

Methods
This study is a secondary analysis of cross-sectional data from the first wave (2009-2011) of The Irish Longitudinal Study on Ageing (TILDA), which included 8,175 Irish adults ≥50 years of age. Participants were included in the present study if they reported a previous doctor diagnosis of hypertension. Antihypertensive medication regimens were compared and categorised according to the 2011 National Institute for Health and Clinical Excellence (NICE)[1] prescription guidelines, which included the use of angiotensin converting enzyme inhibitors, angiotensin receptor blockers, beta-blockers, calcium channel blockers, and thiazide diuretics in the treatment of hypertension. In this study, the antihypertensive medication regimens of participants were categorised based on age categories (&lt;55, ≥55, and all age groups), and compared to the 2011 NICE Guidelines which differentiate treatment in those ≥55, and &lt;55 years of age. The effects of patient sociodemographic factors on prescriber adherence to the guidelines, and the effects of guideline adherence on blood pressure control, (defined as blood pressure&lt;140/90 mmHg), were determined using multinomial logistic regression models. The mlogit, RRR code in STATA 17 SE was used to report relative risks (RRs).

Results
A total of 2,992 participants were included, of whom 54.9% were women. The mean age of participants was 65.69 years (±9.23). Male gender, older age and lower socioeconomic status among participants were associated with increased prescriber guideline adherence. Prescribers were less likely to adhere to guidelines in female patients ≥55 years (RR 0.75 [0.62 to 0.91]), and female patients across all age groups (RR 0.80 [0.67 to 0.95]). Better blood pressure control was seen with medication regimens adherent to prescription guidelines with a mean of 140.38 (±18.98)/83.09 (±11.02) mmHg compared to a mean of 141.66 (±19.86)/84.77 (±11.71) mmHg in those non-adherent to guidelines.

Conclusion
This study highlights the effects of patient gender on prescriber adherence to antihypertensive prescription guidelines. A study strength is the use of a large, nationally representative cohort that used a standardised protocol of data collection within the Irish population. A potential limitation is the inclusion of self-reported data, including doctor diagnosis of hypertension. The results of this study may emphasise a larger issue of the systemic undertreatment of women within healthcare; however, these results should be interpreted in the context of 2011 guidelines, which have since been superseded by 2019 NICE guidelines. Further research may seek to determine possible reasons for such differences in hypertensive care.

Reference
1. Linden B. NICE guidance on primary hypertension National Institute for Health and Clinical Excellence (2011) Hypertension: Clinical Management of Primary Hypertension in Adults. NICE Clinical Guideline 127. British journal of cardiac nursing. 2011;6:582-584.