Lung cancer rates are nearly 60 per cent higher in Northern Ireland's most deprived areas, a new study has shown.
Teenage pregnancies are also over two-thirds greater in these districts than across Northern Ireland as a whole.
Department of Health figures also showed higher proportions of Catholics and nationalists in the areas with worst outcomes.
Sinn Féin said the Inequalities Monitoring System findings meant the British government had failed to offer basic fair treatment.
The bulletin updates differences in morbidity, the use of health and social services, and access to these services.
Its key findings were: lung cancer incidence rates are 57 per cent higher in deprived areas than in Northern Ireland overall; under 75s living in deprived parts are 34 per cent more likely to die; teenage birth rates in deprived areas are 71 per cent higher; health outcomes in rural areas are generally better than in Northern Ireland overall; higher proportions of Catholics, nationalists and single people are in areas with worst outcomes than in the whole of Northern Ireland; Catholics make up 67 per cent of those living in areas with the worst dental registration rates, despite making up only 44 per cent of the population; 56 per cent of those in areas with the worst access to opticians are Catholic.
Mr John O'Dowd, Sinn Féin's health spokesman, said: "This report is a shocking indictment of the failure of the northern state to provide equal access to proper health care for all citizens.
"Through a combination of low-paid or no jobs, poor housing and living environment and poor diet due to a lower income, nationalists are less likely to have good health. In short they are still second-class citizens.
"If any other government or country were to be the subject of a report which highlighted such major systematic and institutionalised discrimination, it would quite correctly attract international scrutiny and criticism."
Mr O'Dowd has demanded an urgent meeting with health minister Ms Angela Smith to discuss the Department of Health figures. - (PA)