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Suboptimal blood pressure control in chronic kidney disease stage 3: baseline data from a cohort study in primary
Simon D S Fraser1, Paul J Roderick, Natasha J McIntyre
1Academic Unit of Primary Care and Population Sciences, Faculty of Medicine, University of Southampton, South Academic Block, Southampton General Hospital, Tremona Road, Southampton, Hampshire SO16 6YD, UK. s.fraser@soton.ac.uk
Insights
Poor blood pressure (BP) control is common in chronic kidney disease (CKD) patients, especially those with diabetes or albuminuria. Improving BP management in CKD may require combination therapy and addressing adherence.
Area of Science:
- Nephrology
- Cardiology
- Public Health
Background:
- Poorly controlled hypertension is a significant risk factor for mortality and disease progression in chronic kidney disease (CKD).
- CKD stage 3 management, including blood pressure (BP) control, primarily occurs in primary care settings in the UK.
- Effective BP management is crucial for improving patient outcomes in CKD.
Purpose of the Study:
- To investigate the associations of BP control in individuals diagnosed with CKD stage 3.
- To assess BP control rates against established guidelines in a primary care setting.
Main Methods:
- 1,741 patients with CKD stage 3 were recruited from 32 general practices.
- BP control was evaluated using NICE, KDOQI, and KDIGO guidelines.
- Logistic regression analysis identified factors associated with BP control.
Main Results:
- Hypertension prevalence was 88%; achievement rates for NICE, KDOQI, and KDIGO BP targets were 58.1%, 35.9%, and 60.2%, respectively.
- Patients with diabetes and/or albuminuria had lower BP control rates.
- Older age, diabetes, and albuminuria were negatively associated with achieving BP targets.
Conclusions:
- Suboptimal BP control is prevalent in hypertensive CKD patients, particularly those with diabetes and albuminuria.
- There is a need to improve BP control strategies in CKD management.
- Combination antihypertensive therapy, alongside adherence and side effect considerations, may enhance BP control.
Background:
Poorly controlled hypertension is independently associated with mortality, cardiovascular risk and disease progression in chronic kidney disease (CKD). In the UK, CKD stage 3 is principally managed in primary care, including blood pressure (BP) management. Controlling BP is key to improving outcomes in CKD. This study aimed to investigate associations of BP control in people with CKD stage 3.
Methods:
1,741 patients with CKD 3 recruited from 32 general practices for the Renal Risk in Derby Study underwent medical history, clinical assessment and biochemistry testing. BP control was assessed by three standards: National Institute for Health and Clinical Excellence (NICE), National Kidney Foundation Kidney Disease Outcome Quality Initiative (KDOQI) and Kidney Disease: Improving Global Outcomes (KDIGO) guidelines. Descriptive statistics were used to compare characteristics of people achieving and not achieving BP control. Univariate and multivariate logistic regression was used to identify factors associated with BP control.
Results:
The prevalence of hypertension was 88%. Among people with hypertension, 829/1426 (58.1%) achieved NICE BP targets, 512/1426 (35.9%) KDOQI targets and 859/1426 (60.2%) KDIGO targets. Smaller proportions of people with diabetes and/or albuminuria achieved hypertension targets. 615/1426 (43.1%) were only taking one antihypertensive agent. On multivariable analysis, BP control (NICE and KDIGO) was negatively associated with age (NICE odds ratio (OR) 0.27; 95% confidence interval (95% CI) 0.17-0.43) 70-79 compared to <60), diabetes (OR 0.32; 95% CI 0.25-0.43)), and albuminuria (OR 0.56; 95% CI 0.42-0.74)). For the KDOQI target, there was also association with males (OR 0.76; 95% CI 0.60-0.96)) but not diabetes (target not diabetes specific). Older people were less likely to achieve systolic targets (NICE target OR 0.17 (95% CI 0.09,0.32) p < 0.001) and more likely to achieve diastolic targets (OR 2.35 (95% CI 1.11,4.96) p < 0.001) for people >80 compared to < 60).
Conclusions:
Suboptimal BP control was common in CKD patients with hypertension in this study, particularly those at highest risk of adverse outcomes due to diabetes and or albuminuria. This study suggests there is scope for improving BP control in people with CKD by using more antihypertensive agents in combination while considering issues of adherence and potential side effects.
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