Table 3.

Patient data

	$n$	Age (y)*	Male*	Female*	Left knee*	Right knee*
SB group	103	32.6 $\pm$ 3.32	71	32	31	72
DB group	98	33.2 $\pm$ 3.75	63	35	39	59

${}^{*}$No significant difference between the patient data of the two groups at $p>$ 0.05.