. 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 4.

Correlations between Phase I LENA Measures and Phase II Outcomes

		Conversational Turns			Adult Words
	N	r (95% CI)	P	R²	r (95% CI)	P	R²
All Ages
IQ	146	.14 [−.02 – .30]	.08	.02	.08 [−.09 – .24]	.35	.01
VCI	146	.27 [.11 – .42]	.001	.07	.20 [.04 – .35]	.02	.04
PPVT	146	.21 [.04 – .36]	.01	.04	.14 [−.03 – .29]	.10	.02
EVT	146	.21 [.04 – .36]	.01	.04	.10 [−.07 – .25]	.25	.01
2–17 mos
IQ	51	−.05 [−.32 – .23]	.73	.00	−.11 [−.37 – .17]	.45	.01
VCI	51	.05 [−.23 – .32]	.74	.00	.02 [−.26 – .29]	.90	.00
PPVT	51	.02 [−.26 – .29]	.92	.00	−.01 [−.28 – .27]	.95	.00
EVT	51	.10 [−.18 – .37]	.48	.01	.09 [−.19 – .35]	.54	.01
18–24 mos
IQ	44	.44 [.16 – .65]	.003	.19	.37 [.08 – .60]	.01	.14
VCI	44	.57 [.32 – .74]	<.001	.32	.42 [.14 – .64]	.005	.18
PPVT	44	.43 [.16 – .65]	.003	.19	.33 [.04 – .57]	.03	.11
EVT	44	.45 [.17 – .66]	.002	.20	.27 [−.03 – .52]	.08	.07
25+ mos
IQ	51	.08 [−.20 – .35]	.58	.01	.08 [−.20 – .34]	.60	.01
VCI	51	.25 [−.03 – .49]	.07	.06	.22 [−.06 – .47]	.12	.05
PPVT	51	.19 [−.09 – .44]	.07	.04	.18 [−.10 – .43]	.21	.03
EVT	51	.02 [−.25 – .30]	.87	.00	−.10 [−.37 – .18]	.49	.01

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