Table 1.

Characteristics of the included patients

	Initial staging (n = 211)	Biochemical recurrence (n = 390)
Age (years)	69.1 ± 8.7	68.5 ± 7.7
Bone metastasis	69 (32.7%)	120 (30.8%)
Extensive metastasis	31 (14.7%)	56 (14.6%)
Site of metastasis
Pelvis	51	30
Spine	25	30
Rib	17	19
Humerus	2	6
Femur	9	10
Scapula	9	8
Skull	2	6
Sternum	2	4
Clavicle	0	2
Nature of metastasis
Purely lytic metastasis	4	6
Mixed lytic-sclerotic metastasis	6	10
Purely sclerotic metastasis	28	48
Metastasis with fracture	2	9
Metastasis with soft-tissue component	3	7