Table 4: Generic two-by-two contingency table with the numbers for the four types of subjects defining the four principal strata.
Event
Group Yes (Y = 1) No (Y = 0) Total
Treatment (X = 1) n11,1 + n10,1 n00,1 + n01,1 n11,1 + n10,1 + n01,1 + n00,1
Control (X = 0) n11,0 + n01,0 n00,0 + n10,0 n11,0 + n10,0 + n01,0 + n00,0
Total n11 + n10,1 + n01,0 n00 + n01,1 + n10,0 n