Determinants of early case-fatality among stroke patients in Maputo, Mozambique and impact of in-hospital complications

Abstract

The burden of stroke is increasing in developing countries that struggle to manage it efficiently. We identified determinants of early case-fatality among stroke patients in Maputo, Mozambique, to assess the impact of in-hospital complications. Patients admitted to any hospital in Maputo with a new stroke event were prospectively registered (n = 651) according to the World Health Organization's STEPwise approach, in 2005-2006. We assessed the determinants of in-hospital and 28-day fatality, independently of age, gender and education, and computed population attributable fractions. In-hospital mortality was higher among patients with Glasgow score at admission ≤ 6 (more than fivefold) or needing cardiopulmonary resuscitation during hospitalization (approximately 2.5-fold). Pneumonia and deep vein thrombosis/other cardiovascular complications during hospitalization were responsible for 19.6% (95% confidence interval, 5.3 to 31.7) of ischaemic stroke and 15.9% (95% confidence interval, 5.8 to 24.9) of haemorrhagic stroke deaths until the 28th day. Ischaemic stroke patients with systolic blood pressure 160-200 mmHg had lower in-hospital mortality (relative risk = 0.32, 95% confidence interval, 0.13 to 0.78), and, for those with haemorrhagic events (haemorrhagic stroke), 28-day mortality was higher when systolic blood pressure was over 200 mmHg (hazard ratio = 3.42; 95% confidence interval, 1.02 to 11.51), compared with systolic blood pressure 121-140 mmHg. Regarding diastolic blood pressure, the risk was lowest at 121-150 mmHg for ischaemic stroke and at 61-90 mmHg for haemorrhagic stroke. Early case-fatality was mostly influenced by stroke severity and in-hospital complications. The allocation of resources to the latter may have a large impact on the reduction of the burden of stroke in this setting.

Keywords: Mozambique; early case-fatality; in-hospital complications; stroke.