TABLE 1.

Joints affected by osteoarthritis

Joint	Number of patients, n (%)
	CR tramadol	SR diclofenac
Left knee	37 (82)	40 (77)
Right knee	38 (84)	44 (85)
Left hip	12 (37)	20 (38)
Right hip	14 (31)	24 (46)
Other*	14 (33)	18 (35)

The mean number of joints involved was 2.6±1.0 and 2.8±1.3 for the CR tramadol and SR diclofenac groups, respectively (P=0.6261).

^*Other joints included backs, hands, feet, fingers, toes, shoulders, wrists, ankles and necks. CR Controlled-release; SR Sustained-release