. Author manuscript; available in PMC: 2016 Jan 1.

Published in final edited form as: J Geriatr Phys Ther. 2015 Jan-Mar;38(1):33–39. doi: 10.1519/JPT.0000000000000021

TABLE 2.

Inter-Examiner, Within-Days Reliability

Older Adults with CLBP (n=31)	Measurement Reliability				Procedural Reliability
Older Adults with CLBP (n=31)	Mean (SD)	ICC (95% CI)	SEM	MDC	ICC (95% CI)	SEM	MDC
LM thickness at rest (cm)^a	3.59 (0.95)	0.98 (0.96, 0.99)	0.13	0.35	0.84 (0.67, 0.92)	0.38	1.06
LM thickness contracted (cm)^a	4.04 (0.87)	0.98 (0.96, 0.99)	0.12	0.34	0.82 (0.63, 0.91)	0.40	1.10
LM thickness at rest ALT (cm)^a	3.98 (0.96)	0.97 (0.94, 0.98)	0.15	0.42	0.85 (0.70, 0.93)	0.36	1.01
LM thickness contracted ALT (cm)^a	4.48 (0.91)	0.97 (0.95, 0.99)	0.13	0.37	0.85 (0.69, 0.92)	0.37	1.02

Abbreviations: CLBP, chronic low back pain; SD, standard deviation; ICC, intraclass correlation coefficient; CI, confidence interval; SEM, standard error of measurement; MDC, minimal detectable change; LM, lumbar multifidus; cm, centimeters; ALT, alternative.

Measurements are provided for the left L4/5 multifidi.