New report slams unscientific Jones & Paton 'study'

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The deeply-flawed Jones & Paton, and Kheriaty articles purporting to show suicide contagion.

In the ongoing political campaign against assisted dying law reform, opponents have spread one piece of egregious misinformation after another. One of the most common is supposed “suicide contagion” from assisted dying laws to general suicide, a theory popularised by Catholic Prof. Margaret Somerville. Despite the nonsense of her claim being comprehensively exposed, she still believes that her opinion “will prove to be correct.” Two journal papers published in 2015 purported to, but didn't, establish suicide contagion in Oregon and Washington states.

Note: the report is now published here.

Assisted dying law reform opponents are still relying on a 2015 paper by Catholics David Jones and David Paton, bolstered by a glowing editorial of it written by Catholic psychiatrist Aaron Kheriaty, published in the Southern Medical Journal, as continued ‘proof’ of suicide contagion theory, at least in respect of USA states Oregon and Washington (since data from other lawful jurisdictions contradicts the theory).

Jones & Paton’s article reported the use of econometric modelling to test for ‘suicide contagion’ from Oregon and Washington’s Death With Dignity Act (DWDA) laws. But, in an exposé to be published this week, no fewer than ten ‘deadly sins’ of the study are peeled back to reveal the rot within.

The very deep flaws and biases of the original articles include:

  • Cherry-picking information from cited sources to argue their case, while omitting information from the same sources that contradicted their case;
  • Including test and control subjects whose consequence was likely to maximise the likelihood of finding a positive association;
  • Demonstrating a poor understanding of suicide and its risk and protective factors and failing to control for most confounding effects in their econometric model ‘pudding’;
  • Overegging the “causative suicide contagion” interpretation when no correlation between assisted dying and general suicide rates was found; and
  • Failing to use direct, robust and readily-available evidence that showed their study couldn’t possibly have hoped to return scientifically valid “contagion” proof.

 
The USA’s National Violent Death Reporting System (NVDRS), of which Oregon is a founding member, shows that even if “assisted dying suicide contagion theory” were true, fewer than 2 of 855 Oregon “total suicides” in 2014 could have been attributed to “contagion” from DWDAs.

Further, both Oregon and Washington state rankings for suicide rates have improved, not deteriorated, since their DWDAs came into effect, while the suicide ranking for a relevant control state — Oklahoma — has deteriorated substantially over the same time.

Ultimately, through numerous and deep methodological flaws, the Jones, Paton and Kheriaty articles reveal a bias to promote “assisted dying suicide contagion theory” while ignoring the robust evidence from multiple lawful jurisdictions, including in their own ‘study,’ that contradict it.

The exposé, titled “The ten deadly sins of Jones, Paton and Kheriaty on ‘suicide contagion’,” will be published by DyingForChoice.com later in the week.

Note: the report is now published here.


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