Table 4.

Differences in improvements of IKS knee and function and VAS scores relative to the age and BMI of patients and stage of PFOA

Variable (no patients)	VAS Mean ± SD	IKS knee Mean ± SD	IKS function Mean ± SD
Age ≥ 60 (9)	3.7 ± 2.1	24.3 ± 19.8	28.3 ± 14.1
Age < 60 (14)	3.4 ± 2.5	27.5 ± 20.4	31.7 ± 18.1
p-Value	0.50	0.80	0.46
BMI ≥ 30 (8)	3.1 ± 1.7	27.1 ± 18.8	30 ± 13.8
BMI < 30 (15)	3.8 ± 2.6	25.8 ± 20.9	30.6 ± 18.1
p-Value	0.14	0.55	0.70
Iwano stage 1–2 (16)	3.9 ± 2.6	29.1 ± 20.1	32.8 ± 14.9
Iwano stage 3 (7)	2.7 ± 1.4	19.7 ± 18.7	25 ± 19.5
p-Value	0.16	0.73	0.15

IKS international knee scores, VAS visual analog scale, SD standard deviation, BMI body mass index

Unpaired t-test (p < 0.05)