. Author manuscript; available in PMC: 2010 Jul 1.

Published in final edited form as: Arch Phys Med Rehabil. 2009 Jul;90(7):1176–1184. doi: 10.1016/j.apmr.2009.01.031

Table 2.

Inter-session (within a week per month) reliability, as expressed with the Intra-class correlation coefficient (ICC), of infant sitting posture for all linear parameters.

Variables	ICC’s
	1^st Month	2^nd Month	3^rd Month	4^th Month	Mean
RMS AP	0.24	0.31	0.68	0.52	0.44
RMS ML	0.11	0.55	0.48	0.50	0.41
Range AP	0.07	0.23	0.72	0.54	0.39
Range ML	0.18	0.46	0.53	0.64	0.45
Sway Path	0.48	0.40	0.08	0.32	0.32

Abbreviations: RMS = root mean square, AP = anterior-posterior, ML = medial-lateral