Table 1.

Patient demographics

Demographics	OA	Chondrocalcinosis	p value
Total number of UKAs (medial/lateral)	149 (99/50)	85 (54/29)	0.24
Surgical date	1990–2000	1990–2000
Gender (men/women)	69/77	31/29	0.12
Median age (years) ± standard deviation	67 ± 5.2	74 ± 6.3	0.02
Age range (years)	60–85	65–89
Followup in years, mean (range) ± standard deviation	12 (2–20) ± 6.8	10 (3–18) ± 3.4	0.04
Lost to followup	7	5	0.08
Deaths before 10 years followup	46	36	0.04

UKA = unicompartmental arthroplasty; OA = osteoarthritis without chondrocalcinosis.