Participant characteristics
Se deficiency
DEFICIENCY
A detailed description of analytical sample sizes across growth outcomes in our study of mother–infant dyads is presented in 
Socio-demographic characteristics and Se status of women and children in the study sample(Mean values and standard deviations; medians and inter-quartile ranges; numbers and percentages)SEPP1, selenoprotein P.Whole blood Se < threshold (< 100 µg/l), serum Se < threshold (< 80 µg/l), serum Se deficiency (< 30 µg/l), no thresholds exist for SEPP.Biomarker concentrations are un-scaled, sample sizes represent age at birth (up to 1-d postpartum) and maximum observations with Se biomarkers available.Sample sizes do not correspond to totals for biomarker concentrations, observations without corresponding Se biomarkers are excluded.All values are presented as mean (
Se biomarker concentrations at delivery and in infant venous cord blood(numbers and percentages; mean values and standard deviations)SEPP1, selenoprotein P; IQR, inter-quartile range.WBSe above threshold defined as concentrations ≥ 100 µg/land serum Deficiency defined as serum Spearman correlation coefficients for associations between delivery and VC Se biomarkers in our analyses are described in 
Spearman correlation coefficients (WBSe, whole blood selenium; SEPP1, selenoprotein P; VC, venous cord.