Type
Principal stratum
Event under
the treatment group
Event under
the control group
(i)
(
Y
(1),
Y
(0))=(1, 1)
Yes
Yes
(ii)
(
Y
(1),
Y
(0))=(1, 0)
Yes
No
(iii)
(
Y
(1),
Y
(0))=(0, 1)
No
Yes
(iv)
(
Y
(1),
Y
(0))=(0, 0)
No
No
Table 2:
Principal strata: “Yes” denotes that a subject would suffer the event, and “No” denotes that a subject would not suffer the event.
