. 2016 Aug 22;11(8):e0160962. doi: 10.1371/journal.pone.0160962

Table 3. Correlations among Bayley-III Scales and between Scales in the Bayley-III and the Short Tests by Age Group.

	Bayley-III, 6–18 months					Bayley-III, 19–30 months					Bayley-III, 31–42 months
	Cognitive	Receptive Language	Expressive Language	Fine Motor	Gross Motor	Cognitive	Receptive Language	Expressive Language	Fine Motor	Gross Motor	Cognitive	Receptive Language	Expressive Language	Fine Motor	Gross Motor
Bayley-III	n = 443					n = 454					n = 414
Cognitive	1					1					1
Receptive Language	0.437^***	1				0.604^***	1				0.590^***	1
Expressive Language	0.356^***	0.502^***	1			0.494^***	0.554^***	1			0.603^***	0.639^***	1
Fine Motor	0.533^***	0.490^***	0.408^***	1		0.525^***	0.435^***	0.377^***	1		0.528^***	0.458^***	0.457^***	1
Gross Motor	0.333^***	0.329^***	0.232^***	0.354^***	1	0.392^***	0.407^***	0.350^***	0.421^***	1	0.381^***	0.329^***	0.334^***	0.363^***	1
ASQ-3	n = 221					n = 224					n = 219
Problem Solving	0.119	0.010	0.071	0.062	0.026	0.001	0.075	0.133^*	0.091	0.005	0.323^***	0.374^***	0.454^***	0.292^***	0.111
Communication	0.104	0.082	0.178^**	0.142^*	0.164^*	0.141^*	0.231^***	0.458^***	0.069	0.067	0.361^***	0.402^***	0.560^***	0.286^***	0.147^*
Fine Motor	0.084	0.084	0.077	0.082	0.151^*	0.135^*	0.131^*	0.171^**	0.134^*	0.176^**	0.297^***	0.256^***	0.331^***	0.380^***	0.164^*
Gross Motor	0.147^*	0.148^*	0.047	0.105	0.585^***^b	-0.053	0.013	0.025	0.010	0.175^**	0.110	0.060	0.059	0.090	0.218^***
Personal-Social	0.208^**	0.184^**	0.166^*	0.208^**	0.070	0.033	0.082	0.121	0.065	0.109	0.063	0.140^*	0.240^***	0.102	0.119
Denver-II	n = 225					n = 221					n = 212
Language	0.206^**	0.238^***^a	0.290^***	0.187^*	0.125	0.224^***	0.361^***^a^,^d	0.587^***^a	0.111	0.175^**	0.560^***^e	0.608^***^a	0.650^***	0.443^***	0.284^***
Fine Motor-Adaptive	0.315^***^a	0.279^***	0.168^*	0.277^***^a	0.153^*	0.395^***^a	0.339^***	0.345^***	0.286^***^a	0.257^***	0.455^***	0.377^***	0.426^***	0.507^***^a	0.229^***
Gross Motor	0.264^***	0.270^***	0.085	0.180^**	0.654^***^b	0.133^*	0.171^**	0.207^***	0.198^**	0.406^***^a	0.256^***	0.263^***	0.270^***	0.239^***	0.426^***^a
Personal-Social	0.366^***	0.279^***	0.296^***	0.240^***	0.244^***	0.099	0.174^**	0.185^**	0.182^**	0.197^**	0.274^***	0.194^**	0.200^**	0.166^*	0.111
BDI-2	n = 215					n = 227					n = 193
Cognitive	0.302^***^a	0.223^***	0.209^**	0.274^***	0.244^***	0.256^***^a	0.297^***	0.327^***	0.253^***	0.146	0.536^***^a	0.444^***	0.484^***	0.404^***	0.243^***
Communication	0.205^**	0.164^*	0.194^**	0.195^**	0.229^***	0.350^***	0.403^***^a	0.610^***^a	0.196^**	0.245^***	0.488^***	0.496^***	0.702^***^a	0.329^***	0.325^***
Motor	0.147^*	0.161^*	0.109	0.236^***	0.371^***	0.288^***	0.231^***	0.268^***	0.337^***^a	0.311^***	0.379^***	0.273^**	0.386^***	0.380^***	0.335^***
Personal-Social	0.025	0.072	0.057	0.001	0.077	0.145	0.193^**	0.286^***	0.019	-0.015	0.210^**	0.226^**	0.293^***	0.110	0.126
Adaptive Skills	0.090	0.206^**	0.228^***	0.137^*	0.271^***	0.168^*	0.218^***	0.234^***	0.241^***	0.257^***	0.201^**	0.255^***	0.240^***	0.189^*	0.077
SFI & SFII	n = 192^f					n = 226
Receptive Language	0.187^**	0.224^***	0.130	0.088	0.168^*
Expressive Language	0.258^***	0.373^***^a^,^b^,^c	0.242^***	0.204^***	0.176^*	0.168^*	0.241^***	0.600^***^a	0.077	0.134^*
WHO-Motor	n = 152^g
Gross Motor	0.224^**	0.126	0.282^***	0.061	0.703^***^b

Pearson correlations on internally standardised scores, Standard Errors (SE) computed using bootstrap stratifying by age category and socio-economic sector (n = 1000 replications):

* p<0.05,

** p<0.01,

*** p<0.001. Matching scales bolded.

^a Concurrence larger than ASQ concurrence, matching domain;

^b Concurrence larger than BDI-2 concurrence, matching domain;

^c Concurrence larger than Denver-II concurrence, matching domain;

^d Concurrence larger than SFII concurrence, matching domain;

^e Concurrence larger than Denver-II fine motor-adaptive concurrence with Bayley-III cognitive scale.

^f Children 8–18 months;

^g Children 6–15 months.