Table 4.

Relative biases (RB), standard errors (SE) and mean squared error (MSE) of the estimated quantile coefficients with disease misspecification under Model (1) at quantile levels 0.1, 0.5 and 0.9. P₀ is the true disease prevalence.

	WrongPrev	τ = 0.5			τ = 0.9
		RB (%)	SE	MSE × n	RB (%)	SE	MSE × n
KS	P0/2	−9.1	0.043	4.0	−7.9	0.059	7.2
	P0/1.5	−7.8	0.043	3.9	−6.4	0.059	7.0
	P0/1.2	−6.3	0.043	3.8	−4.4	0.058	6.7
	P0	−4.7	0.042	3.6	−2.0	0.056	6.3
	1.2P0	−3.7	0.042	3.5	−1.1	0.055	6.1
	1.5P0	−1.1	0.041	3.4	1.2	0.055	6.0
	2P0	3.4	0.040	3.3	5.2	0.052	5.5
SICO (T=10)	P0/2	−8.7	0.043	3.9	−7.5	0.058	6.9
	P0/1.5	−7.2	0.043	3.8	−5.9	0.057	6.6
	P0/1.2	−5.9	0.042	3.7	−4.2	0.056	6.4
	P0	−4.5	0.042	3.6	−2.7	0.056	6.2
	1.2P0	−2.9	0.042	3.5	−0.9	0.055	6.0
	1.5P0	−0.4	0.041	3.4	1.7	0.054	5.7
	2P0	3.4	0.040	3.3	5.8	0.052	5.4