Regression models for analyzing radiological visual grading studies – an empirical comparison

BMC Medical Imaging

Table 7 Estimated parameters, Goodness-of-fit statistics and dose reduction of GQrank

Model	Coefficient						Goodness-of-fit		Dose Reduction
Model	logCTDI		id2		id4		AIC	Pseudo R²	id2	id4
	Est.	P-value	Est.	P-value	Est.	P-value	AIC	Pseudo R²	id2	id4
regress^a	−4.671	<0.001	−0.817	<0.001	−0.463	<0.001	-	0.1134	16.04 %	9.43 %
regress^a	(−5.158, −4.183)		(−.989, −.644)		(−0.635, −0.290)		-	0.1134	(13.36 %, 18.73 %)	(6.44 %, 12.42 %)
ologit^a	−9.433	<0.001	−1.691	<0.001	−1.033	<0.001	2427.97	0.1269	16.41 %	10.37 %
ologit^a	(−10.550, −8.317)		(−2.039, −1.343)		(−1.395, −0.672)		2427.97	0.1269	(13.93 %, 18.88 %)	(7.39 %, 13.36 %)
rologit^a	−4.766	<0.001	−0.709	<0.001	−0.576	<0.001	1337.79	0.1270	13.81 %	11.38 %
rologit^a	(−5.516, −4.015)		(−0.940, −0.477)		(−0.823, −0.328)		1337.79	0.1270	(10.23 %, 17.40 %)	(7.35 %, 15.41 %)
mixed^b	−4.671	<0.001	−0.8167	<0.001	−0.4625	<0.001	2619.45	0.0000	16.04 %	9.43 %
mixed^b	(−5.145, −4.196)		(−0.985, −0.648)		(−0.631, −0.294)		2619.45	0.0000	(13.42 %, 18.66 %)	(6.51 %, 12.34 %)
meologit^b	−9.380	<0.001	−1.680	<0.001	−1.027	<0.001	2367.96	0.0105	16.40 %	13.37 %
meologit^b	(−9.506, −9.255)		(−1.956, −1.405)		(−1.331, −0.723)		2367.96	0.0105	(13.91 %, 18.89 %)	(7.45 %, 13.29 %)

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