Table 1. Demographics and Baseline Characteristics of Patients ^a.

Variables	Fentanyl Group (n = 86)
Age, y	45.5 ± 18
Gender, male/female	48/38
Site of tumor
Extremities	38 (44.1)
Retroperitoneal	26 (32.5)
Trunk and chest	8 (9.3)
Head and neck	12 (13.9)
Mediastinum	2 (2.3)
Duration of pain, mo	14.3 ± 20.2

^a Data are presented as mean ± SD or No. (%).