To conclude: . It seems that the test realized by SAS is corresponding to a chi-squared test without Yates's correction for continuity (same used by prop.test function in R); . To get a SAS's test where p-value corresponds with Wald's confidence intervals, we have to add VAR=SAMPLE option; . To get a exact test where p-value corresponds to an exact's confidence intervals, we have to add "EXACT=Binomial" instruction. Thereby with various essay, it seems that Clopper-Pearson's confidence intervals corresponds with the exact's p-value (more than Wilson). The only doubt is that p-value from this test is slightly different from that given by the binom.test function of R (which also does the Clopper-Pearson's confidence intervals and the exact test of the binomial distribution).
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