Table 1.

mtDNA copy number in PBLs by selected characteristics

Characteristics	N (%)	Mean (SD)	P value
Age at diagnosis, years
<55	100 (31.55)	2.45 (1.37)	Ref.
55–65	140 (44.16)	2.37 (1.58)	0.369
>65	77 (24.29)	2.16 (1.15)	0.194
Smoking status at diagnosis
Non-smoker	181 (57.10)	2.43 (1.56)	Ref.
Former smoker	95 (29.97)	2.22 (1.13)	0.673
Current smoker	41 (12.93)	2.26 (1.40)	0.510
BMI at diagnosis, kg/m2
<25	37 (11.67)	2.30 (1.26)	Ref.
25–29.99 (overweight)	99 (31.23)	2.44 (1.72)	0.901
≥30 (obese)	128 (40.38)	2.35 (1.38)	0.932
Total GS
≤6	93 (29.34)	2.43 (1.59)	Ref.
7	182 (57.41)	2.35 (1.40)	0.464
≥8	42 (13.25)	2.13 (1.09)	0.274
Clinical tumor stage
T1	179 (56.47)	2.45 (1.60)	Ref.
T2	118 (37.22)	2.22 (1.15)	0.446
T3–T4	20 (6.31)	2.05 (1.11)	0.285
PSA at diagnosis
<10 ng/ml	244 (76.97)	2.29 (1.42)	Ref.
10–20 ng/ml	46 (14.51)	2.43 (1.32)	0.301
>20 ng/ml	27 (8.52)	2.65 (1.60)	0.170
D’Amico risk group
Low	79 (24.92)	2.42 (1.54)	Ref.
Intermediate	164 (51.74)	2.40 (1.40)	0.743
High	74 (23.34)	2.14 (1.33)	0.078
Initial primary treatment
Radical prostatectomy	170 (53.63)	2.38 (1.62)	Ref.
Radiotherapy	65 (20.50)	2.28 (1.22)	0.693
Surveillance or unknown	72 (22.71)	2.27 (1.08)	0.691
Other treatment	10 (3.15)	2.60 (1.33)	0.410