Table 1.

Extrusion of the Medial Meniscus on Supine MR Imaging, Supine US, and Weight‐Bearing Position

	MR Imaging: Supine	US: Supine, Relaxed	US: Supine, Active Leg Lift	US: Upright, Weight‐Bearing
Normal meniscus
Reader 1	1.1 ± 1.0 (0–3.4)	0.8 ± 0.9 (−0.4 to 2.8)	1.2 ± 1.0 (0–3.8)	1.6 ± 1.1 (0–4.0)
Reader 2	1.2 ± 0.9 (0–3.3)	0.8 ± 0.8 (0–2.3)	1.1 ± 0.8 (0–3.2)	1.6 ± 1.0 (0–3.9)
Mucoid degeneration
Reader 1	1.6 ± 1.2 (0–4.6)	1.6 ± 1.2 (0–4.4)	1.9 ± 1.1 (0–3.4)	2.3 ± 0.9 (0.6–3.7)
Reader 2	1.7 ± 1.1 (0–4.5)	1.6 ± 1.2 (0–4.3)	1.8 ± 1.0 (0–4)	2.3 ± 1.0 (0.4–4.0)
Torn meniscus
Reader 1	1.8 ± 1.2 (−0.8 to 4.4)	1.6 ± 1.2 (−1.5 to 3.6)	2.0 ± 1.1 (0–4.0)	2.3 ± 1.2 (0–4.4)
Reader 2	1.9 ± 1.0 (−1.0 to 4.4)	1.5 ± 1.1 (0–4.0)	1.9 ± 1.2 (0–4.5)	2.4 ± 1.1 (0–4.8)
ICC	0.940	0.902	0.853	0.885

The values depict mean ± standard deviation (and range) in millimeters.

ICC indicates intraclass correlation coefficient; MR, magnetic resonance; US, ultrasound.