Table 3.

Spearman correlation coefficients (ρ) for maternal delivery and venous cord Se biomarkers

	Maternal delivery specimens									Infant venous cord specimens
	WBSe			Serum Se			SEPP1			WBSe			SEPP1
	n	ρ	P	n	ρ	P	n	ρ	P	n	ρ	P	n	ρ	P
WBSe Del	447	1	–	376	0·6	< 0·0001	385	0·3	< 0·0001	332	0·5	< 0·0001	320	–0·00001	0·9
Serum Se Del	376	0·6	< 0·0001	497	1	–	487	0·4	< 0·0001	321	0·3	< 0·0001	389	0·1	0·02
SEPP1 Del	385	0·3	< 0·0001	487	0·4	< 0·0001	651	1	–	377	0·03	0·6	488	0·2	< 0·0001
WBSe VC	332	0·5	< 0·0001	321	0·3	< 0·0001	377	0·03	0·6	443	1	–	404	0·1	0·001
SEPP1 VC	320	–0·00001	0·9	389	0·1	0·02	488	0·2	< 0·0001	404	0·2	0·001	557	1	–

WBSe, whole blood selenium; SEPP1, selenoprotein P; VC, venous cord.