Mid-term outcomes of a novel liner design in kinematically-designed cruciate-retaining total knee arthroplasty

Table 1 Patient demographics, n (%)

	Knees (n = 139)
Sex
Male	53 (38.1)
Female	86 (61.9)
Age (years) (range)	66.0 (39 to 85)
Race
White	94 (67.6)
Black or African American	21 (15.1)
Asian	3 (2.2)
Other	21 (15.1)
Smoking status
Current	4 (2.9)
Former	55 (39.6)
Never	80 (57.6)
ASA score
1	2 (1.4)
2	99 (71.2)
3	37 (26.6)
4	1 (0.7)
BMI (kg/m2) (range)	31.4 (20.5 to 51.2)
CCI1	3.4 (0 to 13)
Primary diagnosis
Primary OA	137 (98.6)
Post-traumatic OA	2 (1.4)
Time to follow-up (days) (SD)	851.8 (135.9)

¹n = 110 due to differences in data availability between centers.

ASA: American Society of Anesthesiologists; BMI: Body mass index; CCI: Charlson comorbidity index; OA: Osteoarthritis; RA: Rheumatoid arthritis; SD: Standard deviation.