Table 2.

Summary of correlations between in vivo measurements on 68Ga-PSMA PET and ex vivo parameters

		GSC	D’Amico classification	N-stage	PI-RADS score
ASP (%)	Rho	0.88	0.6	− 0.07	0.26
	p value	p < 0.05	p < 0.05	p > 0.05	p > 0.05
	CI 95%	0.78–0.94	0.32–0.78	− 0.51–0.4	− 0.11–0.57
VTV (cm3)	Rho	0.51	0.49	− 0.06	0.33
	p value	p < 0.05	p < 0.05	p > 0.05	p > 0.05
	CI 95%	0.23–0.72	0.17–0.71	− 0.5–0.4	− 0.04–0.62
TLB	Rho	0.43	0.38	0	0.3
	p value	p < 0.05	p < 0.05	p > 0.05	p > 0.05
	CI 95%	0.12–0.66	0.04–0.64	− 0.45–0.45	− 0.07–0.6
SUVmax	Rho	0.29	0.29	− 0.14	0.22
	p value	p > 0.05	p > 0.05	p > 0.05	p > 0.05
	CI 95%	− 0.04–0.56	− 0.06–0.58	− 0.56–0.33	− 0.15–0.54
SUVmean	Rho	0.24	0.2	0.13	0.1
	p value	p > 0.05	p > 0.05	p > 0.05	p > 0.05
	CI 95%	− 0.09–0.53	− 0.15–0.51	− 0.35–0.55	− 0.27–0.44
SUVpeak	Rho	0.3	0.3	− 0.05	0.13
	p value	p > 0.05	p > 0.05	p > 0.05	p > 0.05
	CI 95%	− 0.03–0.57	− 0.05–0.58	− 0.49–0.42	− 0.24–0.47
PSA (ng/ml)	Rho	0.27	0.15	0.07	0.12
	p value	p > 0.05	p > 0.05	p > 0.05	p > 0.05
	CI 95%	− 0.06–0.55	− 0.21–0.47	− 0.4–0.51	− 0.25–0.46

Spearman’s rank correlation method. This table summarizes the associations between the ASP, VTV, TLB, SUVmax, SUVmean, SUVpeak and PSA in the left column and the GSc, D’Amico classification, N-stage and the PI-RADS score in the upper row using Spearman’s rank correlation method. The closest significant (p < 0.05) correlations were measured between ASP and GSc followed by a moderate correlation towards the D’Amico classification. A significant (p < 0.05) weak correlation was seen between VTV and the GSc. Statistically significant correlations (p < 0.05) are highlighted in italics. Abbreviations: ASP asphericity, VTV viable tumor volume, TLB total lesion binding rate, SUVmax maximum standardized uptake value, SUVmean mean standardized uptake value, SUVpeak peak standardized uptake value, PSA prostate-specific antigen blood level, GSc Gleason score, PI-RADS prostate imaging reporting and data system