Table 2.

Categorical demographics.

	Classic	Smart
n	101	99
ASA
1	5	7
2	83	75
3	13	17
Kellgren Lawrence
2	16	19
3	54	48
4	31	32
Ahlback
1	26	24
2	40	36
3	23	30
4	10	8
5	2	1
Etiology
Osteoarthritis	96	98
Rheumatoid arthritis	4	0
Other	0	1