Insights into Imaging

Table 3 Multivariate regression analyses of factors affecting Dice similarity coefficient in the private external testing group

From: Development and clinical utility analysis of a prostate zonal segmentation model on T2-weighted imaging: a multicenter study

	CG				PZ
Impact factors	Estimate	Lower (2.5%)	Upper (97.5%)	p value	Estimate	Lower (2.5%)	Upper (97.5%)	p value
Tumor location	− 0.179	− 0.471	0.114	0.230	− 0.092	− 0.541	0.357	0.690
Lesion diameter	− 0.062	− 0.192	0.069	0.354	− 0.030	− 0.205	0.145	0.736
PI-RADS	− 0.063	− 0.292	0.167	0.594	− 0.048	− 0.372	0.276	0.771
T stage	− 0.087	− 0.517	0.343	0.691	0.017	− 0.617	0.651	0.958
PZv	− 0.027	− 0.053	− 0.000	0.046	− 0.032	− 0.068	0.004	0.082
CGv	0.026	0.012	0.041	< 0.001	0.022	0.005	0.038	0.011
CGv/WGv	− 1.557	− 3.709	0.596	0.156	− 5.202	− 8.060	− 2.344	< 0.001
Sphericity	2.192	− 3.149	7.532	0.421	− 4.066	− 11.973	3.842	0.314
Presumed circle area ratio	− 3.157	− 7.604	1.290	0.164	− 2.973	− 9.482	3.535	0.371
MR field strength	0.536	0.049	1.023	0.031	0.063	− 0.698	0.824	0.872
Vendor	0.524	0.171	0.878	0.004	0.545	0.024	1.066	0.040
Slice thickness	− 0.311	− 0.625	0.003	0.052	0.221	− 0.242	0.684	0.349
Pixel spacing	0.459	− 0.053	0.971	0.079	− 0.241	− 1.043	0.562	0.557

Significant p values (< 0.05) are shown in bold. PZ Peripheral zone, CG Central gland, PI-RADS Prostate Imaging-Reporting and Data System, PZv Peripheral zone volume, CGv Central gland volume, WGv Whole gland volume

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