recul minimum requis était de 2 ans.

17:12 Nov 24, 2018 

I think it would help to indicate at what point in the text this short phrase appears and in what section or what the heading was. As this is all about a point in time, it is describing a relationship between a couple of events or at least between time A and time B. Given that the conception and expression of time can vary from one language to another, then it would be helpful to have more information and background.

18:36 Nov 22, 2018 

"recul inférieur à 2 ans de la reprise chirurgicale.
recul minimum requis était de 2 ans."

that would sound to me like a comment on why some data was excluded.

1 -- "recul inférieur à 2 ans de la reprise chirurgicale" = statement of fact: the opinion / evaluation was given before 2 years passed from this "reprise chirurgicale";
2 -- "recul minimum requis était de 2 ans" = the reason to reject the data: you have to wait at lest two years before declaring a "final" result (as in: it's not "a success" if it goes wrong within 2 years)

But then, without more context it's just guessing.

18:28 Nov 20, 2018 

Is this the full text?

"recul inférieur à 2 ans de la reprise chirurgicale.
recul minimum requis était de 2 ans."

If I can read correctly, but phrases are inccomplete. Daryo also requested more context, i.e. the full paragraph if possible.

16:59 Nov 20, 2018 

Past tense is used to indicate that is what was used for the study.

16:58 Nov 20, 2018 

A certain distance in time (evolution) that allows to draw conclusions.

16:55 Nov 20, 2018 

Normally you wouldn't use "prendre du recul" for a continuous action like an ongoing follow-up, but to say that some time was elapsed or has to elapse before doing some evaluation IOW "recul" implies: "wait some time, don't rush your judgement ..."

16:23 Nov 20, 2018 

That sentence was as is.
For instance again here, the context is:
recul inférieur à 2 ans de la reprise chirurgicale

16:17 Nov 20, 2018 

Can you please add corresponding context, e.g. the phrase, where "recul minimum requis était de 2 ans." is mentioned, in order to verify the answers?