A kappa value of 0.00 0.10 is considered poor strength of agreement, 0.11 .20 slight agreement, 0.21 0.40 fair agreement, 0.41 0.60 moderate agreement, 0.61 0.80 substantial agreement and 0.81 1.00 is considered almost perfect agreement [ 30].
To test for the strength of agreement, inter-rater agreement statistics was conducted [ 21].
The kappa statistic measures strength of agreement between examiners discounting chance agreement.
The kappa statistic indicates the strength of agreement for a categorical assessment, corrected for agreement by chance.
For each item, we examined the strength of agreement with each recommendation, and the variation in extent of agreement among panellists.
When describing the strength of agreement, according to the commonly adopted classification, a rho_c <0 = poor agreement, 0-0.2 = slight, 0.21-0.4 = fair, 0.41-0.6 = moderate, 0.61-0.8 = substantial and 0.81-1 0.81-1st perfect [ 17].
The relative strength of agreement intended by the various respondents can be judged, and the intensity of agreement between statements compared.
The reference values for the strength of agreement are from Altman [ 31] who considers < 0.20 as poor agreement, 0.21-0.40 as fair, 0.41-0.60 as moderate, 0.61-0.80 as good and 0.81-1.00 as a very good agreement.
If the strength in agreement for different reading categories is the same, then δ1=δ2=δ3, and the non-homogeneous agreement model reduces to the homogeneous agreement model.
The strength of agreement between attitude and behavior appears to be moderate with 74% observed agreements and a Kappa coefficient of 0.479 955% C.I 0.39 0.56).
