Kirriemummy - don't tell me how to use statistics. As you seem to be implying that everyone on the thread is a fascist/racist numpty, I have copied and pasted an extract gor your perusal. It is all sourced. I don't tend to cite wiki as a source but this is mumsnet and I have three kids to look after.
"It has long been recognised that the health of Irish Travellers is significantly poorer than that of the general population in Ireland. This is evidenced a 2007 report published in Ireland states that over half of Travellers do not live past the age of 39 years.[27] Another government report of 1987 found:
From birth to old age, they have high mortality rates, particularly from accidents, metabolic and congenital problems, but also from other major causes of death. Female Travellers have especially high mortality compared to settled women.[28]
In 2007, the Department of Health and Children in the Republic of Ireland, in conjunction with the Department of Health, Social Services and Public Safety in Northern Ireland, commissioned the University College Dublin School of Public Health and Population Science to conduct a major cross-border study of Travellers' welfare. The study, including a detailed census of Traveller population and an examination of their health status, is expected to take up to three years to complete.[29]
Genetic studies by Miriam Murphy, David Croke, and other researchers identified certain genetic diseases such as galactosemia that are more common in the Irish Traveller population, involving identifiable allelic mutations that are rarer among the rest of the community. Two main hypotheses have arisen, speculating whether:
this resulted from marriages made largely within and among the Traveller community, or
suggesting descent from either an original Irish carrier long ago with ancestors unrelated to the rest of the Irish population.[30]
They concluded that: The fact that Q188R is the sole mutant allele among the Travellers as compared to the non-Traveller group may be the result of a founder effect in the isolation of a small group of the Irish population from their peers as founders of the Traveller sub-population. This would favour the second, endogenous, hypothesis of Traveller origins. No estimate was given for the date of the original mutation, but it is now clear that it mutated from other galactosemia-causing mutations that are found within the larger Irish population.