Table 1.

Comparison of baseline data between the two groups

Variables	Validation group (n=75)	Training group (n=178)	χ2	P
Age (years old)
≥65	24	64	0.364	0.546
<65	51	114
Body mass index
≥25 kg/m2	17	29	1.441	0.230
<25 kg/m2	58	149
Ethnicity
Han	61	129	2.216	0.137
Others	14	49
Marital status
Married	71	171	0.249	0.618
Divorced	4	7
Educational level
≥ High school	48	112	0.026	0.871
< High school	27	66
Family history of cancer
With	4	14	0.512	0.474
Without	71	164
Intraductal carcinoma of the prostate
With	8	20	0.017	0.895
Without	67	158
Neural invasion
With	45	121	1.488	0.222
Without	30	57
Hypertension
With	35	93	0.657	0.417
Without	40	85
Diabetes mellitus
With	26	45	2.303	0.129
Without	49	133
T-staging
T4	51	118	0.069	0.792
Below T4	24	60
N-staging
N1	45	116	0.609	0.435
N0	30	62
Gleason score
≤8	52	110	1.301	0.254
>8	23	68
Initial PSA (ng/mL)
≥182.76	27	62	0.032	0.859
<182.76	48	116
Testosterone (nmol/L)
≥21.59	26	61	0.004	0.952
<21.59	49	117
HGB (g/L)
≥103	67	153	0.531	0.466
<103	8	25
ALP (U/L)
≥185.7	13	24	0.626	0.429
<185.7	62	154
LDH (U/L)
≥237.05	21	48	0.028	0.866
<237.05	54	130
ALB (g/L)
≥48	10	32	0.822	0.365
<48	65	146

Note: PSA: Prostate-specific antigen, HGB: Hemoglobin, ALP: Alkaline phosphatase, LDH: Lactate dehydrogenase, ALB: Albumin.