Does contralateral knee range of motion predict postoperative knee range of motion after total knee arthroplasty?

Table 2 Outcome: postoperative ROM at final follow-up for operative knee; predictor: contralateral ROM, n = 59

Predictor	Association prior to 115°, slope (95% CI)	P value	Association from 115°, slope (95% CI)	P value	Difference between groups, P value
Contralateral ROM, all patients	−0.32 (−1.1, 0.43)	0.4016	0.93 (0.58, 1.29)	<0.001	NA
Contralateral ROM, male	0.47 (−0.88, 1.83)	0.4841	0.99 (0.48, 1.51)	0.0003	0.7664
Contralateral ROM, female	−0.61 (−1.55, 0.32)	0.1951	0.89 (0.37, 1.40)	0.0010	0.7664
Contralateral ROM, age <63	−0.84 (−2.16, 0.49)	0.2088	1.14 (0.66, 1.61)	<0.0001	0.2158
Contralateral ROM, age ≥63	0.03 (−0.91, 0.97)	0.9481	0.68 (0.10, 1.25)	0.0216	0.2158
Contralateral ROM, varus	−0.90 (−1.78, − 0.02)	0.0445	0.84 (0.44, 1.24)	0.001	0.9119
Contralateral ROM, valgus	NE		0.92 (−0.41, 2.25)	0.1723
Contralateral ROM, neutral	NE		NE
Contralateral ROM, CR	NE		1.344 (0.49, 2.19)	0.0025	0.2924
Contralateral ROM, PS	−0.23 (−1.01, 0.55)	0.5569	0.85 (0.44, 1.25)	<0.0001	0.2924

CI confidence interval, CR cruciate retaining, NA, not applicable, NE not estimated (due to small sample size), PS posterior stabilized, ROM range of motion

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