In fact, there is a way of doing that. And we, as programmers, have access to those methods. It's called Numerical Analisys. At times it's quite amazing to see how well mathematics can estimate data.
One of the examples, is German Tank Problem. https://www.numberphile.com/videos/clever-way-to-count-tanks
While being an extremely opaque problem we are able to handle it to an extremely precise numbers.
One does not have to be that acquainted with the ways of math to figure things out. One can just use some data source and point such data source out. I mean, any book, be that a book on financing or programming book would have a list of references under such statements.
And here we have it. An absolutely out-of-wack statement saying that the poorest regions of Britain are affected by this condition more than others. Who? Why? Where? How was this number obtained?
Probably "contradictory" is not a right word for such a claim. But I would love to see at least anything that would prove such a statement.
In fact, flip to the end of the DSM and look for the list of references. You'll find none. I kid you not, there is not a single reference to an outside source in this book. This means that my work on "Use of Dynamic Library Link to execute Assembly code in C#" that I've written in 2005 while in the university has 6 more references to outside sources than the DSM itself.
The reason for my beef in here mainly that all the numbers are just stated, with no respect to what numbers are. And I would expect either an explanation of a numerical method to estimate this number, or a source as to where this number has been gotten from.