People are most likely to develop their first depressive episode between the ages of 30 and 40, and there is a second, smaller peak of incidence between ages 50 and 60.[264] The risk of major depression is increased with neurological conditions such as stroke, Parkinson's disease, or multiple sclerosis, and during the first year after childbirth.[265] It is also more common after cardiovascular illnesses, and is related more to those with a poor cardiac disease outcome than to a better one.[251][266] Studies conflict on the prevalence of depression in the elderly, but most data suggest there is a reduction in this age group.[267] Depressive disorders are more common in urban populations than in rural ones and the prevalence is increased in groups with poorer socioeconomic factors, e.g., homelessness.[268]