. 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 5.

Intra-session (within each session) reliability, as expressed with the Intra-class correlation coefficient (ICC), of infant sitting posture for all nonlinear parameters.

Variables	ICC’s

	1^st Month		2^nd Month		3^rd Month		4^th Month
Sessions	1^st	2^nd	1^st	2^nd	1^st	2^nd	1^st	2^nd	Mean
ApEn AP	0.54	0.66	0.39	0.65	0.62	0.67	0.59	0.64	0.60
ApEn ML	0.66	0.60	0.75	0.73	0.72	0.56	0.69	0.59	0.66
LyE AP	0.53	0.26	0.31	0.29	0.45	0.52	0.14	0.21	0.34
LyE ML	0.18	0.30	0.31	0.47	0.33	0.41	0.43	0.39	0.35
CoD AP	0.52	0.43	0.25	0.36	0.51	0.44	0.29	0.41	0.40
CoD ML	0.23	0.52	0.31	0.32	0.34	0.36	0.57	0.16	0.35

Abbreviations: ApEn = approximate entropy, LyE = luapunov exponent, CoD = correlation dimension, AP = anterior-posterior, ML = medial-lateral