Does mild flexion of the femoral prosthesis in total knee arthroplasty result in better early postoperative outcomes?

Table 6 Comparison of KSS before and after surgery and between groups (\(\overline{\mathrm x}\) ± s)

	Anterior extension group	Mildly flexed group	Moderately flexed group	Excessively flexed group	F	P value
Number	21	41	32	19	-	-
Pre-op	82.14 ± 18.14	84.78 ± 23.90	85.72 ± 22.69	84.47 ± 25.59	0.106	0.956
2 weeks post-op	57.48 ± 16.42	59.00 ± 15.60	57.19 ± 16.27	56.11 ± 17.84	0.159	0.924
1 month post-op	99.10 ± 25.99	110.56 ± 22.85	105.50 ± 20.56	103.11 ± 25.82	1.230	0.302
3 months post-op	129.00 ± 15.89	141.59 ± 15.91^*	137.03 ± 14.41	133.53 ± 15.74	3.370	0.021
6 months post-op	148.86 ± 12.02	162.68 ± 12.79^*	155.84 ± 12.29	151.37 ± 15.28	6.550	< 0.001
1 year post-op	161.43 ± 13.06	174.17 ± 11.84^*	167.06 ± 12.15	162.16 ± 11.91	7.061	< 0.001
F	248.481	458.780	351.189	147.725	-	-
P value	0.000	0.000	0.000	0.000	-	-

KSS Knee society score
^*, ^a,^b indicates statistically significant differences between two groups at the same time point (P < 0.05)
At 3 months postoperatively, ^*P = 0.003 compared to the anterior extension group
At 6 months postoperatively, ^*P < 0.001 compared to the anterior extension group, P = 0.027 compared to the moderately flexed group, and P = 0.002 compared to the excessively flexed group
At 1 year postoperatively, ^*P < 0.001 compared to the anterior extension group, P = 0.015compared to the moderately flexed group, and P = 0.001 compared to the excessively flexed group

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