Table 1.

Patient-reported and physician-measured knee flexion, extension and ROM (mean ± s.d.)

	Patient-reported Mean ± s.d. (n = 286)	Physician-reported Mean ± s.d. (n = 286)	Difference (physician–patient) Mean ± s.d. [95% CI] (n = 286)	P-valuea
Extension	3.0 ± 4.8	1.4 ± 4.3	−1.6 ± 5.0 [−2.2, −1.0]	<0.001
Flexion	111.4 ± 14.6	110.0 ± 12.8	−1.5 ± 12.4 [−3.0, −0.1]	0.04
ROM	108.6 ± 16.8	108.6 ± 14.3	0.02 ± 14.3 [−1.6, 1.7]	0.98

^aComparisons were made using independent-sample t-test.