Table 2. The mean length of meniscal extrusion, transverse diameter and ratio of extrusion.

Parameter	Meniscal root tear		Other meniscal tear		Normal
	Reader 1	Reader 2	Reader 1	Reader 2	Reader 1	Reader 2
Length of extrusion (L)	2.97 (±1.23)	2.91 (±1.19)	1.33 (±0.70)	1.22 (±0.76)	1.22 (±1.13)	1.21 (±1.14)
Transverse diameter of medial meniscus (T)	23.13 (±1.81)	23.29 (±2.08)	26.77 (±2.25)	26.02 (±3.31)	24.66 (±3.14)	24.37 (±3.40)
L/T	0.13 (±0.06)	0.13 (±0.06)	0.05 (±0.03)	0.04 (±0.03)	0.05 (±0.04)	0.05 (±0.04)

Length of meniscal extrusion and transverse diameter values are in millimetres. Data in parentheses are standard deviations.