Does surgeon handedness affect the outcomes after primary total knee arthroplasty? A retrospective cohort study

Table 1 Basic characteristics of included patients, n (%)

Variables		Group D (n = 177)	Group N (n = 193)	P value
Age (years), mean ± SD (range)		57.87 ± 9.16 (29 to 77)	58.54 ± 8.50 (30 to 76)	0.2321
Gender	Male	32 (18.1)	46 (23.8)	0.1752
	Female	145 (81.9)	147 (76.2)
Diagnosis	OA	144 (82.4)	151 (78.2)	0.5152
	RA	33 (18.6)	42 (21.2)
BMI (kg/m2), mean ± SD (range)		24.7 ± 3.1 (18.9-34.1)	23.7 ± 3.3 (18.9-33.5)	0.2451

¹Students' t-test compares the mean difference between variables.

²χ² test compares proportions between both groups.

The level of significance was considered at a P value < 0.05. RA: Rheumatoid arthritis; OA: Osteoarthritis; BMI: Body mass index.