Arthroplasty

Table 1 Comparison of the between-group baseline characteristics before and after PSM

From: Slight femoral under-correction versus neutral alignment in total knee arthroplasty with preoperative varus knees: a comparative study

Characteristics	Before PSM (n = 330)			After PSM (n =256)
Characteristics	Neutral group (n = 159)	Under-correction group (n = 171)	P	Neutral group (n = 128)	Under-correction group (n = 128)	P
Gender (Male: Female)	22:137	44:127	0.007^b	22:106	19:109	0.609^b
Side (Left: Right)	79:80	83:88	0.835^b	64:64	60:68	0.617^b
Age (year)	63.63±8.45	66.74±8.00	0.001^a	64.44±8.72	65.23±7.78	0.441^a
BMI (kg/m²)	25.23±3.17	25.48±3.25	0.472^a	25.12±3.27	25.53±3.34	0.316^a
Pre-HKA angle (degree)	-10.89±5.54	-11.72±6.05	0.197^a	-12.21±5.25	-11.27±6.13	0.190^a

PSM propensity score matching, BMI body mass index, HKA hip-knee-ankle, For HKA angle, varus was negative and valgus was positive
^a stands for student t-test
^b stands for chi-square test; data are recorded as number or mean ± standard deviation

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ISSN: 2524-7948

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