Case (Treatment T
2
)
Control(Treatment T
1
)
Response Positive (+)
Response Negative (–)
Total (n
i
.)
Response Positive (+)
N
11
n
12
n
1
.(=n
11
+n
12
)
Response Negative (–)
N
21
n
22
n
2
.(=n
21
+n
22
)
Total (n.
j
)
N.
1
(=n
11
+n
21
)
n.
2
(=n
12
+n
22
)
n..(=n)
Table 1:
Fourfold Table for the presentation of Data on Matched Samples.
