Table 3.

Intra- Rater Reliability of the variables

		Repeat 1	Repeat 2	Intra-class Correlation Coefficient	95% Confidence Interval		SEMc	SEMd
					Lower Bound	Upper Bound
Multifidus thickness L5-S1 level during Task1a(mm)	Rt	33.92±5.56b	34.64±5.94	0.85	-1.53	0.459	0.86	0.92
	Lt	34.75±6.01	35.73±6.08	0.87	-1.94	-0.026	0.93	0.94
Multifidus thickness L3-L4 level during Task1(mm)	Rt	33.61±4.47	34.74±4.34	0.81	-1.96	-0.285	0.69	0.67
	Lt	35.21±4.16	35.84±4.44	0.74	-1.60	0.352	0.64	0.68
Multifidus thickness L5-S1 level during Task2 a(mm)	Rt	34.82±5.65	35.69±5.29	0.84	-1.84	0.109	0.87	0.82
	Lt	35.81±5.32	36.80±6.24	0.84	-2.05	0.064	0.82	0.96
Multifidus thickness L3-L4 level during Task2(mm)	Rt	35.37±4.30	36.32±4.42	0.64	-2.12	0.204	0.66	0.68
	Lt	35.78±4.13	37.02±4.69	0.72	-2.291	-0.189	0.64	0.72

^aTask 1= Arm elevation with glenohumeral joint at 125 degree of abduction and elbow at right angle, without weight at hand, Task 2= Arm elevation with glenohumeral joint at 125 degree of abduction and elbow at right angle, with weight (0.5 kg) at hand,

^bValues are Means and Standard Deviation,

^cStandard Error of Measurement, Repeat 1,

^dStandard Error of Measurement, Repeat 2.