who attended a mixed school by their early 40s

[suprunp]

It shows that boys taught in singlesex schools are more likely to be divorced or separated from their partner than those who attended a mixed school by their early 40s.
(Why single-sex schools are bad for your health (if you're a boy); The Independent)

Is it Okay to paraphrase the sentence in the following way:

"It shows that boys taught in singlesex schools are more likely to be divorced or separated from their partner by their early 40s than those who attended a mixed school."

Thanks.

[Gillnetter]

It shows that boys taught in singlesex schools are more likely to be divorced or separated from their partner than those who attended a mixed school by their early 40s.
(Why single-sex schools are bad for your health (if you're a boy); The Independent)

Is it Okay to paraphrase the sentence in the following way:

"It shows that boys taught in singlesex schools are more likely to be divorced or separated from their partner by their early 40s than those who attended a mixed school."

Thanks.

I believe that your rendition is much better than the original. The original seems to say that those who attended a mixed school while they were in their early 40s are less likely to become divorced or separated than those who attended a single sex school.

What is the location of this publication (The Independent)? They seem to have a rather unique manner of writing. For example, I found this bit in The Independent -

"From the time he riveted attention as the brilliant baby of the beautifully balanced Leeds United midfield which was so integral to the Yorkshiremen's league title triumph of 1991-92, right through until he presided inspirationally over the unexpected recent renaissance of Wales as a force in international football, Gary Speed, who has apparently committed suicide, barely put a foot wrong."