Table 3.

Agreement of Parent Concern and Infant-Toddler Checklist Screen Compared to Communication on the Behavior Sample

	Age in Months when ITC was Completed
	6–8		9–11		12–14		15–17		18–20		21–24
Delayed Communicationa	n = 17		n = 66		n = 100		n = 86		n = 79		n = 57
	Parent Concern
	Yes	No	Yes	No	Yes	No	Yes	No	Yes	No	Yes	No
ITC Positive Screen	18%	18%	29%	53%	24%	74%	34%	58%	42%	41%	53%	33%
ITC Negative Screen	35%	29%	2%	17%	0%	2%	0%	8%	8%	10%	7%	7%
Typical Communicationa	n = 83		n = 193		n = 230		n = 152		n = 140		n = 71
	Parent Concern
	Yes	No	Yes	No	Yes	No	Yes	No	Yes	No	Yes	No
ITC Positive Screen	2%	7%	3%	9%	4%	11%	9%	13%	5%	9%	14%	4%
ITC Negative Screen	18%	72%	13%	76%	14%	70%	9%	70%	27%	59%	46%	35%
Kappa Statistic
Parent Concern & ITC Screen	.08		.19**		.10*		.28***		.15*		.08
Parent Concern and Behavior Sample	.27**		.16**		.06		.18**		.17*		.01
ITC Screen and Behavior Sample	.28**		.67***		.75***		.66***		.68***		.67***
Logistic Regression	Delay	Typical	Delay	Typical	Delay	Typical	Delay	Typical	Delay	Typical	Delay	Typical
Percentage of Correct Prediction	17.6	97.6	81.8	88.6	98.0	84.3	91.9	78.3	82.3	86.4	86.0	81.7
β (S.E.) for Parent Concern	−1.45 (.58)**		−0.26 (.46)		−0.22 (.43)		−0.22 (.41)		−0.53 (.39)		0.53 (.51)
β (S.E.) for or ITC Screen	−1.60 (.67)**		−3.52 (.40)***		−5.60 (.74)***		−3.77 (.46)***		−3.35 (.39)***		−3.40 (.51)***

^aBased on the CSBS DP Behavior Sample standard scores in the second year

^*p <.05

^**p <.01

^***p <.001