. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Early Child Res Q. 2014 Jan 1;28(1):10.1016/j.ecresq.2013.09.002. doi: 10.1016/j.ecresq.2013.09.002

Table 3.

Child Care Sample Regressions Predicting Bayley Mental Scale at 24 Mos. (effect size estimates)

	(1) Child Care Sample Weight B (SE)	(2) Propensity Weight B (SE)
Low Quality <=35 Hours	−0.25^* (0.10)	−0.10 (0.09)
Low Quality >35 Hours	−0.27^** (0.10)	−0.19^* (0.09)
Medium Quality <=35 Hours	Reference	Reference
Medium Quality >35 Hours	0.14 (0.08)	0.15^* (0.08)
High Quality <=35 Hours	0.08 (0.12)	0.24 (0.14)
High Quality >35 Hours	0.08 (0.12)	0.33^** (0.11)
Center Care 24 Mos.	−0.19 (0.07)	0.04 (0.07)
Medium Income	0.04 (0.08)	−0.03 (0.09)
Main effect of quality tests
Low vs. medium	−3.93^*** (0.89)	−3.26^*** (0.78)
Medium vs. high	0.14 (0.94)	2.29^* (0.96)
Low vs. high	−3.47^** (1.18)	−4.71^*** (1.07)
Main effect of quantity	−0.38 (0.72)	−0.53 (0.71)
Quality X Quantity Interactions	ns	ns
Constant	−0.07^*** (0.16)	−0.02^*** (0.17)

N	1350	1350
R²	0.26	0.29

Note.

p < 0.05,

^**

p < 0.01,

^***

p < 0.001.

Regression 1 was weighted using the 24 month child care weight W2C2P0 and standard errors were calculated using the appropriate PSU and stratum variables. Regression 2 was weighted by the inverse of the propensity that a child would be in the actual care category they were observed to be in. Controls include 9-month Bayley, child’s ethnicity, gender, and age, Mother’s education, maternal sensitivity (NCATS), family structure (whether single mother), whether low or very low birth weight, whether home language is English, whether first born, and number of siblings. Ns were rounded to the nearest 50.