Confluence of suicide and drug overdose epidemics in young Australian males: common causality?

While the naive correlation coefficient between the accidental poisoning and suicide trends over 1979–2011 was 0.72 suggesting a moderate-to-strong correlation, fitting a time series transfer function between the drug overdose and suicide series to assess their co-incidence yields a numerator regression coefficient (‘moving average’ term) significant at p =0.0311, and the denominator regression coefficient (‘autoregressive’ term) was borderline significant at p =0.0600.

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