Table 1.
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)
| Maternal and household characteristics*,† | Maternal delivery specimens | Infant venous cord specimens | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Whole blood Se | Serum Se | SEPP1 | Whole blood Se | SEPP1 | ||||||
| Mean | sd | Mean | sd | Mean | sd | Mean | sd | Mean | sd | |
| n | 467 | 517 | 677 | 448 | 562 | |||||
| Age (years) | 23 | 4 | 23 | 4 | 23 | 4 | 23 | 4 | 23 | 4 |
| Gravidity | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 |
| Height (cm) | 151 | 6 | 151 | 5 | 151 | 5 | 151 | 6 | 151 | 6 |
| Gestational age at delivery (in weeks) | ||||||||||
| Median | 39·1 | 39·1 | 39·1 | 39·1 | 39·3 | |||||
| IQR | 1·7 | 1·9 | 1·7 | 1·7 | 1·9 | |||||
| Weight at delivery (kg) | 61 | 10 | 61 | 10 | 61 | 10 | 61 | 10 | 61 | 10 |
| BMI (kg/m2) | 24 | 4 | 24 | 4 | 24 | 4 | 24 | 4 | 24 | 4 |
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 (sd) unless indicated otherwise.