Related Experiment Video
Updated: Jun 23, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
Pathological sub-types, risk factors and outcome of stroke at the Nairobi Hospital, Kenya
1Department of Medicine, Aga Khan University Hospital, Nairobi, P.O. Box 30270-00100, Nairobi, Kenya.
Insights
This study found ischemic stroke to be the most common type, with hypertension as the leading risk factor in Nairobi. The in-hospital stroke prevalence was 3042/100,000, with most patients discharged.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Stroke is a leading cause of death and disability globally.
- Risk factors like hypertension, diabetes, and smoking are prevalent, especially in tropical regions.
- Co-morbidities such as HIV/AIDS and sickle cell disease are increasingly observed.
Purpose of the Study:
- To determine the pathological subtypes of stroke.
- To identify prevalent risk factors and co-morbidities associated with stroke.
- To ascertain the in-hospital period prevalence and outcomes of stroke patients.
Main Methods:
- A hospital-based retrospective study was conducted at The Nairobi Hospital.
- Data from 80 patients diagnosed with stroke (cerebral vascular accident) between 18 and 95 years old were analyzed.
- WHO diagnostic criteria were used for stroke diagnosis.
Main Results:
- Ischemic stroke accounted for 85% of cases, with hypertension (80%) and diabetes mellitus (33.7%) as primary risk factors.
- The in-hospital period prevalence of stroke was 3042/100,000.
- The mean hospital stay was 12.5 days, with a 93.8% discharge rate and a 5% in-hospital mortality rate.
Conclusions:
- Ischemic stroke is the most common subtype in this study population.
- Hypertension is the predominant risk factor for stroke.
- The study highlights a significant in-hospital stroke prevalence and generally favorable outcomes with timely management.
Background:
Stroke is one of the most common causes of morbidity and mortality the world over. Established risk factors such as arterial hypertension, diabetes mellitus, cigarette smoking, hyper-lipidaemia, micro-vascular rupture, male gender, age and observed co-morbities such as sickle cell disease, HIV/AIDS infection and cerebral malaria are increasingly being encountered in the tropics.
Objectives:
To determine pathological sub-types, risk factors, in-hospital period prevalence and in-hospital outcome of stroke.
Design:
Hospital-based retrospective study.
Setting:
The Nairobi Hospital, Nairobi, Kenya.
Subjects:
Patients with recorded diagnosis of stroke/cerebral vascular accident; as per WHO criteria for diagnosis of stroke, all gender and age > or = 18 years were studied.
Results:
A total of 2629 patients were admitted to the division of medicine at the hospital during study period. Eighty patients had diagnosis of stroke; giving an in-hospital period prevalence of 3042/100,000. Mean age was 61.3 years, mode; 63 years, range 34-95 years. Males were 43 (53.8%), M to F ratio 1.2:1 stroke sub-types: Ischaemic stroke 68 (85%), haemorrhagic stroke seven (8.8%). In five patients (6.3%) no evidence of stroke sub-type was on-record. Established risk factors for stroke included hypertension and diabetes mellitus. Hypertension was found in 64 patients (80%) and diabetes-mellitus in 27 (33.7%). Twenty three patients (28.8%) had both hypertension and diabetes-mellitus. Co-morbidities were observed and included mitral-stenosis, cardiac-arrhythmias cardio-myopathy, HIV/AIDS, Left Ventricular Hypertrophy (LVH), infective endocarditis, atrial septal aneurysm, carotid plaques with or without stenosis and hyper-homocystenemia. Mean hospital stay was 12.5 days; range 22-70 days. Seventy five patients (93.8%) were discharged and four (5%) died in hospital. All patients who died had anterior circulation ischaemic stroke as per Trial of Org 10172 in Acute Stroke Treatment (TOAST) classification.
Conclusion:
Ischaemic stroke is the most common pathological sub-type observed in this study. Hypertension is the leading observed risk factor for stroke. Hospital period prevalence for stroke of 3042/100,000 was found. Seventy five patients (93.8%) were discharged and four (5%) died in hospital.
Related Concept Videos
Stroke: Introduction and Types
Hemorrhagic Stroke l: Introduction
Ischemic Stroke l: Introduction
Ischemic Stroke ll: Pathophysiology
Hemorrhagic Stroke ll: Pathophysiology