Clinical and haematological determinants of outcome among children with cerebral malaria in a tertiary centre in Nigeria

Abstract

 Background: Many cl inicaland haematological changes occur as a result of severe malaria, of which cerebral malaria (CM) is a common entity. These changes affect virtually all organs and systems of the body. We identify various clinical and haematological determinants of outcome in CM so as to institute proactive management of such children.

Methods: All children who met World Health Organization (WHO) diagnostic criteria for CM over 8 month-period were prospectively studied. The presenting symptoms and its duration, detailed physical examination and laboratory parameters were obtained. Logistic regression was employed to determine the prognostic significance of various clinical and laboratory parameters. Outcome indicators were full recovery, alive with neurological sequelae or death of the children. Results: Of the 892 children admitted into the Children Emergency Unit (CEU) over the study period, 50 (5.6%) had CM with M: F ratio of 1:1 and age range of 6 months to 12 years. Sixty percent were aged less than 5 years. The defining symptoms were fever (100%), coma (100%) and convulsion (98%). Forty-one (82%) patients survived, while nine (18%) died. Of the 41 survivors, 30 (73.2%) recovered fully, while 11 (26.8%) had neurological deficits at discharge. Identified clinical and laboratory predictors of mortality and neurological sequelae in CM included Blantyre coma score of 0-2(p = 0.018) prolonged coma recovery time > 26 hours (p = 0.026), abnormal breathing pattern (p = 0.0124), absent corneal reflex (p = 0.012), absent pupillary reflex (p = 0.012), depressed tendon reflex (p = 0.028), hyperreflexia (p = 0.014), retinal haemorrhage (p = 0.001), duration of admission (p=0.000), hyper parasitaemia (p =0.001), hypoglycemia (p= 0.014) and leucocytosis (p = 0.008). Independent determinants of immediate post-recovery neurological deficits and death were hyper-parasitaemia (OR = 8.657, p = 0.017.) and leucocytosis(OR = 1.090; p = 0.035
Conclusion: CM is a potentially reversible encephalopathy associated with high mortality and sequelae. Affected children with the above listed clinical / haematological parameters especially hyperparasitemia and leucocytosis should be given proactive management to improve the outcome.
Key words: cerebral malaria, clinical and haematologic parameters, outcome