Women suffer more pain than men across the whole body, major global study finds
(www.theguardian.com)
I should really stop responding if you aren't going to read the thread. Tl;dr: Their data is not any more reliable and it's insane that you think that claim was being made at any point.
And "You need to come up with an explanation"-- no, we don't. The article's title is an illogical claim to make based on the study's methodology. Pointing that out does not require coming up with a reason why the two values (reported vs experienced pain) might differ, it only requires pointing out that they are not necessarily correlated. The authors of the study knew this, which is why they did not make the claim that the article is making.