Highly cross-linked versus conventional polyethylene inserts in total hip arthroplasty, a five-year Roentgen stereophotogrammetric analysis randomised controlled trial

Table 2 Patient and baseline characteristics

	Conventional PE	REXPOL
Number of patients, n (%)	25 (49)	26 (51)
Gender, n (%)
Male	10 (40)	10 (39)
Female	15 (60)	16 (59)
BMI, mean ± SD kg/m2	26.7 ± 2.9	27.2 ± 3.4
Age at operation in years, mean ± SD	68.5 ± 4.6	68.6 ± 5.1
HOOS pain, mean ± SD	46.5 ± 21.6	51.1 ± 17.7
HOOS ADL, mean ± SD	41.1 ± 16.6	46.0 ± 17.2
HHS, mean ± SD	50.6 ± 12.7	54.6 ± 10.9

PE: Polyethylene; BMI: Body mass index; HOOS: Hip injury and osteoarthritis outcome score; ADL: Activity of daily living; HHS: Harris hip score.