Table 4.

Comparison of the kappa coefficients based on expert ratings and sample status for all measures

Measure	Kappa based on		z	p
	Sample status	Expert rating
High P-SDQ score	0.52	0.50	0.39	0.697
High Y-SDQ score	0.20	0.23	0.53	0.598
High P-SDQ symptom + impact	0.65	0.60	0.70	0.485
High Y-SDQ symptom + impact	0.24	0.25	0.21	0.830
High PY-SDQ symptom + impact	0.65	0.67	0.31	0.753
High P-DAWBA band	0.43	0.57	3.69	<0.001
High Y-DAWBA band	0.33	0.45	3.41	0.001
High PY-DAWBA band	0.48	0.67	3.54	<0.001

All kappa coefficients are significant at p < 0.001