Table 4.

Agreement between observers (weighted kappa)

Observer	P2	P3	P4	P5
P2	-	0.53	0.48	0.45
P3	0.53	-	0.50	0.49
P4	0.48	0.50	-	0.58
P5	0.45	0.49	0.58	-

< 0.00 = No agreement

0.00–0.20 = Slight agreement

0.21–0.40 = Fair agreement

0.41–0.60 = Moderate agreement

0.61–0.80 = Substantial agreement

0.81–1.00 = Almost perfect agreement