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A two-by-two table representing concordance/discordance of both diagnostic tests.
| Diagnostic test 1 (gold standard) |
Total | ||
|---|---|---|---|
| Positive | Negative | ||
| Diagnostic test 2 (new test) |
|||
| Positive |
a
(p 11 = a/n) |
b
(p 12 = b/n) |
a + b
(p 2 = (a + b)/n) |
| Negative |
c
(p 21 = c/n) |
d
(p 22 = d/n) |
c + d |
|
| |||
| Total |
a + c
[p 1 = (a + c)/n] |
b + d | n |
