Table 4. Association between center-based child care attendance and early childhood development at 2 years.

	Crude		Model I		Model II
	BETA	(95%CI)	BETA	(95%CI)	BETA	(95%CI)
Cognitive development		< 0.001*		< 0.001*		0.001*
Never	0		0		0
Some point in life	2.53	(1.41–3.65)	1.67	(0.50–2.85)	1.35	(0.17–2.53)
Always	4.21	(2.68–5.74)	2.87	(1.26–4.78)	2.44	(0.83–4.05)
Fine motor skills		0.18*		0.25*		0.48*
Never	0		0		0
Some point in life	0.60	(-0.42–1.61)	0.52	(-0.56–1.61)	0.32	(-0.78–1.41)
Always	0.72	(-0.66–2.11)	0.69	(-0.79–2.17)	0.44	(-1.05–1.93)
Gross motor skills		0.86*		0.68*		0.54*
Never	0		0		0
Some point in life	-0.47	(-1.51–0.57)	-0.55	(-1.66–0.55)	-0.64	(-1.76–0.47)
Always	0.21	(-1.22–1.63)	0.01	(-1.51–1.52)	-0.13	(-1.65–1.39)
Language development		< 0.001*		0.04*		0.24*
Never	0		0		0
Some point in life	2.16	(0.50–3.82)	0.53	(-1.19–2.24)	-0.17	(-1.90–1.55)
Always	5.26	(2.99–7.53)	2.68	(0.33–5.02)	1.83	(-0.52–4.19)

Crude analysis (n = 3,778); Model I: adjusted for sex, maternal age, family income, maternal education, gestational age, low birth weight, and maternal depression (n = 3,561); Model II: Model I + stimulation variables (n = 3,561); * Test for trend.