Comparison of functional recovery of the knee following total knee arthroplasty in patients with and without ankle symptoms

Table 1 Demographic characteristics of the participants before the intervention, n (%)

		Group 1 (n = 30)	Group 2 (n = 49)
Gender	Male	6 (20)	26 (53.06)
	Female	24 (80)	23 (46.94)
	Male-to-female ratio	0.25	1.13
Operated side	Right	18 (60)	26 (53.06)
	Left	12 (40)	23 (46.94)
Age (years)	Mean SD	73.33 ± 6.94	68.98 ± 7.18
	Minimum	61	49
	Maximum	86	84
Body mass index (kg/m2)	Mean SD	30.79 ± 5.54	30.72 ± 4.56
American Society for Anesthesiologists score	1	1 (3.33)	12 (24.49)
	2	14 (46.67)	18 (36.73)
	3	15 (50)	19 (38.78)

Table 2 Patient characteristics comparison between groups

	Group 1	Group 2	P value
Age (years) (mean SD)	73.33 ± 6.94	68.98 ± 7.18	0.01
Male-to-female ratio	0.25	1.13	0.01
Body mass index (kg/m2) (mean SD)	30.79 ± 5.54	30.72 ± 4.56	0.96

Table 3 Comparison of preoperative results between groups

	Group 1	Group 2	P value
	Median (IQR)	Median (IQR)
American Orthopaedic Foot and Ankle Society	77.5 (71.25-82)	97 (93-99)	< 0.001
Knee Injury and Osteoarthritis Outcome Score	36 (26.25-42.75)	40 (32-49)	0.18
Flexion	95 (80-100)	110 (100-120)	0.03
Extension	5 (0-15)	0 (0-10)	0.16
Visual analogue scale	6 (4-7)	7 (5-8)	0.04

IQR: Interquartile range.

Table 4 Comparison of three months postoperative results between groups

	Group 1	Group 2	P value
	Median (IQR)	Median (IQR)
American Orthopaedic Foot and Ankle Society	87.5 (83-96)	96 (94-100)	< 0.001
Knee Injury and Osteoarthritis Outcome Score	67 (59.25-71.75)	72 (65-78)	0.02
Flexion	100 (90-110)	110 (100-120)	0.05
Extension	0 (0-5)	0 (0-0)	0.01
Visual analogue scale	2 (1-4)	3 (2-4)	0.17

IQR: Interquartile range.