|
|
|
front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |review |
 |
Kappa = (Po
- Pe)/(1
- Pe)
Where:
Po = A + D
Pe
= [(A+B)*(A+C) + (C+D)*(B+D)]/N2
Po = Proportion of
subjects observed to be
concordant*
Pe = Proportion of
subjects expected to be
concordant*,
based on chance alone
N
=Total number of subjects
*Where
both sources of data agree that subject either has presence or
absence of disease
|