evidence: For Northern Ireland, 'General health' refers to a person's health over the 12 months prior to Census day (27 March 2011). [...] A long-term health problem or disability that limits a person's day-to-day activities and has lasted or is expected to last at least 12 months. This includes problems that are related to old age. [...] A long-term condition refers to a condition which has lasted, or is expected to last, at least 12 months.