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. 2019 Sep 5;14(9):e0221675. doi: 10.1371/journal.pone.0221675

Table 5. Correlations among Bayley-III scales and between scales in the Bayley-III and the ASQ-3 by age group (Grandmother is the primary caregiver).

	Bayley III, 5–12 months					Bayley III, 13–18 months					Bayley III, 19–24 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 = 115					n = 181					n = 163
Cognitive	1					1					1
Receptive Language	0.704^***	1				0.722^***	1				0.495^***	1
Expressive Language	0.614^***	0.72^***	1			0.599^***	0.779^***	1			0.460^***	0.548^***	1
Fine Motor	0.842^***	0.661^***	0.613^***	1		0.364	0.379*	0.281	1		0.589^***	0.428^***	0.509^***	1
Gross Motor	0.761^***	0.575^***	0.543^***	0.812^***	1	0.641^***	0.585^***	0.614^***	0.323^*	1	0.511^***	0.443^***	0.502^***	0.529^***	1
ASQ-3	n = 115					n = 181					n = 163
Problem Solving	0.156	0.166	0.041	0.101	0.153	0.166*	0.081.	0.047	-0.039	0.127	0.168^*	0.139	0.128	0.125	0.152^*
Communication	0.229^*	0.214^*	0.185^*	0.206^*	0.198^*	0.082	0.246^***	0.326^***	0.046	0.111	0.312^***	0.279^***	0.522^***	0.319^***	0.330^***
Fine Motor	0.030	0	-0.039	0.011	0.080	0.246^***	0.234^***	0.219^***	0.079	0.275^***	0.165^*	0.158^*	0.149^*	0.196^**	0.143
Gross Motor	0.176^*	-0.010	0.020	0.139	0.359^***	0.316^***	0.248^***	0.225^***	0.168	0.568^***	0.238^***	0.201^***	0.227^**	0.245^***	0.372^***
Personal-Social	0.212^*	0.067	0.022	0.145	0.196^*	0.318^***	0.269^***	0.258^***	0.073	0.24^***	0.168^*	0.206^**	0.140	0.114	0.196^*

Note: Pearson correlations on internally standardised scores; Standard Errors (SE) computed using bootstrap stratifying by age category

* p<0.05

** p<0.01

*** p<0.001.