AIM The aim of this study was to define the prevalence of and risk factors for behavioural disorders in children with epilepsy from a rural district of Tanzania by conducting a communitybased case-control study.METHOD One hundred and twelve children aged 6 to 14 years (55 males, 57 females; median age 12y) with active epilepsy (at least two unprovoked seizures in the last 5y) were identified in a cross-sectional survey and included in this study. Children who were younger than 6 years were excluded in order to eliminate febrile seizures. Behaviour was assessed using the Rutter scale; children who scored 13 or more were considered to have disordered behaviour. A comparison group was made up of age-and sex-matched children without epilepsy (n=113; 57 males, 56 females; median age 12y).RESULTS Behavioural disorders were diagnosed in 68 of 103 (66%) children with epilepsy and in 19 of 99 (19%) controls. Disordered behaviour was significantly more common in children with epilepsy than in the comparison group (univariate odds ratio 8.2; 95% confidence interval [CI] 4.3-15.6; p<0.001) and frequent seizures and poor scholastic attainment were associated in children with epilepsy. Behavioural disorders were not associated with antiepileptic drug usage. Attention problems were present in 48 of 91 (53%) children with epilepsy and 16 of 97 (17%) controls (univariate odds ratio 5.7; 95% CI 2.9-11.1; p<0.001). In children with epilepsy, attention problems were significantly more common in males and were associated with frequent seizures.INTERPRETATION Children with epilepsy in a rural area of sub-Saharan Africa have a high prevalence of behavioural disorders and attention problems, both of which are associated with frequent seizures. Providing behaviour assessment and appropriate intervention programmes for children with epilepsy may reduce the burden of behaviour disorders in this setting.Epilepsy is the most common neurological disorder worldwide; it is estimated that 80% of affected children live in resource-poor countries. 1 The prevalence of behavioural disorders in children in urban settings in high-income countries is greater in those with epilepsy than in those without epilepsy 2,3 and is greater than in those with other chronic conditions such as diabetes and asthma. 2,4,5 In high-income countries, the prevalence of behavioural disorders in children with epilepsy ranges from 20 to 60%. [6][7][8][9][10] Behavioural disorders are associated with early onset of seizures, 11 certain seizure types, 11 increased seizure frequency, 7,11 polytherapy, 12 cognitive impairment, 3 family factors, parenting practices, and infant temperament. [13][14][15] There are limited data on the prevalence and nature of behavioural problems in children with epilepsy in low-income countries. Two studies from India found similar rates of behavioural (54%) and psychiatric disorders (23%) to those reported from high-income countries. 16,17 There are only a few studies on behavioural disorders in children with epilepsy from Africa. A study...