Pigmented villonodular synovitis does not influence the outcome following cementless total hip arthroplasty using ceramic-on-ceramic articulation: a case-control study with middle-term follow-up

Table 2 Patient characteristics and follow-up between the PVNS group and the control group

	PVNS (n = 19)	Controls (n = 38)	p value
Age (year), mean ± SD	35.2 ± 10.2	35.2 ± 10.0	1.000
Gender, n (%)			1.000
Female	12 (63.2%)	24 (63.2%)
Male	7 (36.8%)	14 (36.8%)
Body mass index (kg/m²), mean ± SD	24.6 ± 2.2	24.5 ± 1.9	0.975
American Society of Anesthesiologists score			1.000
1	14	28
2	4	8
3	1	2
Diagnosis, n (%)			–
Osteonecrosis	0 (0%)	27 (71%)
Osteoarthritis	0 (0%)	11 (29%)
PVNS	19 (100%)	0 (0%)
Follow-up (years), mean ± SD	8.7 ± 1.3	8.6 ± 1.1	0.902

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