Table 1.

Description of patients, groups and follow-up

Characteristic		Head material: cobalt-chrome		Head material: alumina
Prosthesis		SHP	SP2	SP2
Cement		Palacos		Palacos	Cemex
Included (hips)		40		44 (47)
Age at operation (range)		67 (55–78)	67 (52–78)	65 (51–76)	70 (51–81)
Gender (male / female)		8/12	8/12	10/14	9/14
Weight at operation (range)		70 (48–100)	71 (53–92)	68 (53–96)	70 (53–95)
Preoperative HHS (range)		39 (15–57)	42 (23–61)	47 (29–71)	48 (17–64)
Randomized		20	20	24	23
Excluded		1	3	1	0
Index RSA		19	17	23	23
Drop-outs at ten years	Dead	7	5	6	4
	Revised	1	0	1	1
	Did not meet	0	3	1	3
Ten-year RSA		11	9	15	16

RSA radiostereometry