. 2011 Feb 24;40(3):670–680. doi: 10.1093/ije/dyr020

Table 4.

Summary of results from the cross-cohort comparison and validation using a randomized trial

Outcome	Comparison method						Validation
	Association with any breastfeeding (per category)^a						Effect of breastfeeding intervention
	ALSPAC			Pelotas			Belarus
	Strong socio-economic patterning in breastfeeding			Weak socio-economic patterning in breastfeeding			Randomized trial
	β	95% CI	P	β	95% CI	P	Difference in outcome^b	95% CI
SBP (mmHg)	−0.35	−0.55 to −0.14	0.001	−0.13	−0.83 to 0.57	0.7	0.2	−2.9 to 3.3
DBP (mmHg)	−0.16	−0.31 to −0.01	0.04	0.05	−0.50 to 0.60	0.9	0.2	−1.8 to 2.2
BMI (kg/m²)	−0.16	−0.22 to −0.09	<0.001	0.14	−0.07 to 0.36	0.2	0.1	−0.2 to 0.3
IQ	0.97	0.62 to 1.32	<0.001	1.97	0.88 to 3.05	<0.001	5.9	−1.0 to 12.8

^aNone/<1 month; 1 to <3 months; 3 to <6 months; ≥6 months; fully adjusted models.

^bIntervention vs control. Results extracted from publications from the Belarus PROBIT trial.¹⁶^,¹⁷

CI, confidence interval.