Table 3.

BSID-II index and Bayley-III composite scores according to age ranges.

Age ranges (months)	n (%)	BSID-II MDI	Bayley-III CC	P1	BSID-II PDI	Bayley-III MC	P2
6–12	82 (32.2%)	92.2 ± 19.4	102.6 ± 20	<0.001	76.8 ± 18.2	89.7 ± 20.8	<0.001
13–18	34 (13.4%)	87.2 ± 19.3	98.5 ± 19.2	<0.001	69.4 ± 20.1	85 ± 19.8	<0.001
19–24	41 (16.1%)	74.5 ± 20.2	90.4 ± 19.9	<0.001	77.5 ± 23.3	88.3 ± 25.7	<0.001
25–30	43 (16.9%)	73.4 ± 18.8	92.7 ± 15.8	<0.001	67.7 ± 15.6	90 ± 16.1	<0.001
31–36	26 (10.1%)	70 ± 23.6	79 ± 18.9	<0.001	68.4 ± 22.9	79 ± 28.4	<0.001
37–42	29 (11.4%)	70.8 ± 19.8	83.9 ± 15.2	<0.001	70.3 ± 21.7	84.4 ± 24.2	<0.001

BSID-II, Bayley Scales of Infant and Toddler Development 2nd Edition; Bayley-III, Bayley Scales of Infant and Toddler Development 3rd Edition; CC, Cognitive Composite; MC, Motor Composite; PDI, Psychomotor Developmental Index; MDI, Mental Developmental Index; P1, BSID-II MDI vs Bayley-III CC; P2, BSID-II PDI vs Bayley-III MC