. Author manuscript; available in PMC: 2019 Oct 1.

Published in final edited form as: Pediatrics. 2018 Sep 10;142(4):e20174276. doi: 10.1542/peds.2017-4276

Table 5.

Correlations between LENA Metrics at 18–24 Months and Phase II Outcomes Adjusted for SES and for Equal Age Group Variance

		Conversational Turns			Adult Words
	n	r (95% CI)	P	R²	r (95% CI)	P	R²
SES Adjusted
IQ	44	.37 [.08 – .60]	.01	.14	.24 [−.06 – .50]	.12	.06
VCI	44	.52 [.26 – .71]	<.001	.27	.30 [.00 – .55]	.05	.09
PPVT	44	.37 [.08 – .60]	.01	.14	.21 [−.09 – .48]	.18	.04
EVT	44	.38 [.10 – .61]	.01	.15	.12 [−.19 – .40]	.46	.01
Equal Variance
IQ	35	.48 [.17 – .70]	.004	.23	.34 [.00 – .60]	.05	.11
VCI	35	.61 [.34 – .78]	<.001	.37	.36 [.03 – .62]	.04	.13
PPVT	35	.58 [.31 – .77]	<.001	.34	.38 [.05 – .63]	.03	.14
EVT	35	.54 [.25 – .74]	.001	.29	.18 [−.16 – .49]	.30	.03

Note: IQ = Wechsler Adult Intelligence Scale Full Scale Intelligence Quotient; VCI = Verbal Comprehension Index; PPVT = Peabody Picture Vocabulary Test; EVT = Expressive Vocabulary Test.