Maternal characteristics in preconception study
| Maternal characteristics at inclusion | Women in preconception cohort with blood collected before conception, n=1248 | n included in calculations |
| Age (years) | 28 (22–34) | 1233 |
| Height (cm) | 155 (152–159) | 1240 |
| Weight (kg) | 55.2 (48.8–63.7) | 1239 |
| Maternal preconception/first antenatal visit BMI (kg/m2) | 22.7 (20.4–26.3) | 1231 |
| Systolic blood pressure (mm Hg) | 116.8 (11.0) | 1233 |
| Diastolic blood pressure (mm Hg) | 75.1 (8.8) | 1233 |
| Parity | 2 (1–4) | 1242 |
| Ethnicity | 1247 | |
| Sambaa | 424 | |
| Zigua | 405 | |
| Others* | 418 | |
| Education | 1247 | |
| None or incomplete primary | 241 (19.3) | |
| Complete primary | 787 (63.1) | |
| Secondary or higher | 219 (17.6) | |
| Source of domestic water | 1244 | |
| Private tap or bore hole | 106 (8.5) | |
| Public tap or bore hole | 809 (65.0) | |
| River/pool | 329 (26.5) | |
| Type of toilet facility | 1246 | |
| Flush | 312 (25) | |
| Pit | 923 (74.1) | |
| None | 11 (0.9) | |
| Haemoglobin (mmol/l) | 12.2 (1.5) | 1233 |
| Anaemia (<12 g/dL) | 458 (36.7%) | 1248 |
| Malaria at enrolment | 101 (8.1%) | 1244 |
| Non-anaemic and malaria-negative at enrolment | 734 (59.0%) | 1244 |
| Diabetes mellitus | 10 (0.8%) | 1232 |
| HIV-seropositive | 54 (5.7%) | 952 |
Data are presented as mean (±SD), median (IQR) or n (%).
*All other tribe groups include tribes with <10% prevalence.
BMI, body mass index.