Table 1b. Definitions of measures of agreement.
Measure | Definition | Calculation | |
---|---|---|---|
PP difference in
coverage |
Difference between coverage level estimated by the two sources |
|
|
Concordance | % of children with the same vaccination status from both sources |
|
|
Kappa statistic | Measure of concordance that corrects for chance agreements.
Interpretation: <0.2 = poor; 0.21-0.4 = fair; 0.41-0.6 = moderate; 0.61-0.8 = substantial; 0.81-1.0 = near perfect |
|
|
Sensitivity | % of children vaccinated according to the reference source that
are vaccinated according to the comparator source |
|
|
Specificity | % of children unvaccinated according to the reference source
that are unvaccinated according to the comparator source |
|
|
Positive
predicative values |
% of children vaccinated according to the comparator source
who were vaccinated according to the reference source |
|
|
Negative
predictive values |
% of children unvaccinated according to the comparator source
who were unvaccinated according to the reference source |
|