Table 3.

Multivariable regression of plant-based diet pattern (as a continuous measure) and birth weight stratified by ethnicity: white European and South Asians

Variables	White Europeans		South Asians
	β	P value	β	P value
Intercept	−4723.7	<0.001	−4248.1	<0.001
Prepregnancy weight (kg)	5.1	<0.001	5.3	<0.001
Maternal height (cm)	9.3	<0.001	6.0	0.01
Parity (number of children)	73.8	<0.001	43.5	0.01
Gestational age (weeks)	159.3	<0.001	155.6	<0.001
Smoking status	−37.6	0.002	ns	ns
Infant sex (female=1)	−127.7	<0.001	−98.3	<0.001
Plant-based (continuous)	−65.9	<0.001	40.5	0.01

White European r²=0.246, South Asian r²=0.178. The same covariates were included for each ethnic-specific model, but non-significant covariates (eg, ‘smoking’ in South Asians) were removed in the final model (denoted as ‘ns’). Smoking status was coded as follows: 0=never smoked, 1=quit smoking prepregnancy, 2=quit smoking during pregnancy or 3=currently smoking. Parity was reported as having 0, 1, 2, 3, 4, 5 or 6 (or more) children. White Europeans (n=2367) and South Asians (n=884).