Table 2.

Hierarchical multiple regression testing SES as moderator of the association between amount of NMC and language skills (n = 2,296)

	Model 1			Model 2			Model 3
	B	SE	β	B	SE	β	B	SE	β
Step 1: Control variables
Cycle	1.85**	.58	.06	1.88***	.58	.06	1.90***	.58	.06
Age in months	.16	.1	.03	.25*	.10	.05	.26*	.10	.05
Birth weight	−3.08**	1.16	−.05	−2.93*	1.16	−.05	−3.01**	1.15	−.05
Language (French)	−1.01	.74	−.03	−1.14	.73	−.03	−1.22	.73	−.03
Language (French/English)	−3.84	2.34	−.03	−4.35	2.34	−.04	−4.34	2.33	−.04
Language (others)	−13.17***	1.02	−.26	−12.92***	1.03	−.25	−13.26***	1.03	−.26
Breast-feeding	−1.69*	.74	−.05	−1.78*	.74	−.05	−1.73*	.74	−.05
Maternal age	.47***	.06	.16	.40***	.07	.13	.42***	.07	.14
Maternal depression	−.05	.07	−.02	−.03	.07	−.01	−.04	.07	−.01
Smoking	−.13*	.06	−.05	−.09	.06	−.03	−.09	.06	−.03
Family functioning	−.24***	.06	−.08	−.21***	.06	−.07	−.20***	.06	−.07
Siblings	−3.02***	.33	−.19	−2.95***	.34	−.18	−2.93***	.33	−.18
Step 2: main effects
SES (low)				−3.20***	.77	−.09	−4.09***	.83	−.11
Part-time NMC				−1.91	1.02	−.04	−1.85	1.10	−.04
Full-time NMC				−.80	.88	−.02	−2.35*	.94	−.06
Step 3: two-way interaction
Low SES* part-time							−1.59	2.75	−.01
Low SES* Full-time							10.37***	2.34	.10

Note. Δ R² = .140 for Step 1; Δ R² = .147 for Step 2; Δ R² = .155 for Step 3 (ps < .001).

^***p < .001;

^**p < .01;

^*p < .05.