Table 5.

Sensitivity, specificity and Youden’s Index of Bayley-II and Bayley-III vs Griffiths

	Sensitivity	Specificity	Youden’s index
	(%)	(%)	(%)
Group 1
Cognitive-Language abilitiesa	97.4	72.2	69.6
Motor abilitiesb	80.8	72.7	53.5
Group 2
Cognitive-Language abilitiesc	78.6	97.3	75.9
Motor abilitiesd	68.0	98.7	66.7

^aBayley-II MDI vs Griffiths Hearing and Speech-Performance Quotients (mean)

^bBayley-II PDI vs Griffiths Locomotor-Eye and Hand Coordination Quotients (mean)

^cBayley-III Cognitive-Language Composite Scores (mean) vs Griffiths Hearing and Speech-Performance Quotients (mean)

^dBayley-III Motor Composite Score vs Griffiths Locomotor-Eye and Hand Coordination Quotients (mean)