Does anyone else find these kinds of reports irritating? It's not the research that gets me (necessarily) but the reporting, because the journalists (and sometimes perhaps even the researchers, as seems to be the case here) clearly have no idea of causality ... or are trying to force a causal link that simply doesn't exist.
Catholics, perhaps subject to discrimination, and possibly more likely to be living in deprived and overcrowded conditions, will understandably have more significant chance of health problems. Fundamentalists are, it seems to me, more likely to be sworn off stimulants like nicotine or "recreational" drugs or alcohol, and will therefore not be subject to their associated health risks. It's not connected with their religion directly at all, so why is there this attempt at making the connection?