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Rates and predictors of stroke-associated case fatality in black Central African patients
B Longo-Mbenza1, M Lelo Tshinkwela, J Mbuilu Pukuta
1Department of Cardiology and Pathophysiology, Division of Cardiology, University of Kinshasa, Kinshasa, Democratic Republic of Congo.
Insights
Acute stroke is a deadly condition in Kinshasa, with ischaemic stroke, high haematocrit, and fibrinogen predicting mortality. Primary prevention of stroke is crucial in Africa.
Area of Science:
- Neurology
- Public Health
- Epidemiology
Background:
- Stroke represents a significant global health burden, particularly in low-resource settings.
- Understanding stroke case fatality rates and predictors is essential for developing targeted interventions.
Purpose of the Study:
- To determine the case fatality rates of stroke in a private clinic in Kinshasa, Democratic Republic of Congo.
- To identify predictors associated with stroke mortality in this population.
Main Methods:
- A prospective study of 212 Black African patients admitted with CT scan-proven stroke.
- Analysis included demographic, clinical, and laboratory variables to assess mortality risk factors.
Main Results:
- The overall stroke case fatality rate was 44%, with ischaemic stroke having a 31% mortality rate.
- Older age, higher leukocyte count, haematocrit, haemoglobin, and fibrinogen levels were associated with increased mortality.
- Ischaemic stroke, higher fibrinogen, and higher glucose levels were significant predictors of mortality.
Conclusions:
- Stroke remains a critical cause of death, with ischaemic stroke, elevated haematocrit, and fibrinogen levels being significant mortality predictors.
- Hyperfibrinogenemia and hyperglycemia are key predictors of case fatality in ischaemic stroke patients.
- Prioritizing primary stroke prevention in Africa is essential for resource allocation.
Objective:
To identify case fatality rates and predictors of stroke in a private clinic in Kinshasa, Democratic Republic of Congo.
Methods:
Two hundred and twelve black Africans were consecutively admitted to a clinic and prospectively assessed during the first 30 days by CT scan-proven stroke types and outcome. Univariate and multivariate analyses were used to estimate the in-hospital mortality risk for the following baseline characteristics: age, gender, education, arterial hypertension, diabetes, stroke types, leukocyte count, and haematocrit, blood glucose, uric acid, fibrinogen and total cholesterol levels.
Results:
Haemorrhagic and ischaemic strokes were present in 52 and 48% of the study population, respectively; and 44% of all stroke type patients, 29% of haemorrhagic stroke and 31% of ischaemic stroke patients died. Compared to the survivors, deceased patients were significantly (p < 0.001) older with higher leukocyte counts and haematocrit, haemoglobin and fibrinogen levels, but lower glycaemic levels. The variable significantly associated with all stroke type mortalities in the multivariate model was ischaemic stroke (HR = 4.28, p < 0.001). The univariate risk factors of mortality in patients with ischaemic stroke were higher fibrinogenaemia (RR = 6.4; 95% CI = 4.8-8.2 for tertile 3 and RR = 12.9; 95% CI = 7.8-18.4 for tertile 4; p < 0.001) and higher glycaemia (RR = 3.3; 95% CI = 1.4-5.7 for tertile 3 and RR = 6.7; 95% CI = 5.2-9.2 for tertile 4; p < 0.001).
Conclusion:
We have shown that all acute stroke types remain a deadly nosological entity, and ischaemic stroke, baseline haematocrit and fibrinogen levels, and dependency on others' care were significantly associated with all stroke mortalities. Moreover, hyperfibrinogaemia and hyperglycaemia were the significant predictors of case fatality in ischaemic stroke patients. In Africa, the top priority for resource allocation for stroke services should go to the primary prevention of stroke.
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