Table 1 Descriptive characteristics of mothers by breastmilk vitamin B12 status at 6 weeks postpartum in Tanzania
Characteristic | Descriptive statistics | B12 < 310 pmol/L (N = 345) | B12 >=310 pmol/L (N = 146) |
|---|---|---|---|
Treatment arm | |||
Placebo | N, column % | 180 (52.2) | 64 (43.8) |
Multivitamins | N, column % | 165 (47.8) | 82 (56.2) |
Maternal age in years | Mean, SD | 25.9 (5.1) | 25.5 (5.0) |
Maternal age (years) | |||
< 20 | N, column % | 49 (16.3) | 24 (18.3) |
20–24 | N, column % | 89 (29.7) | 36 (27.5) |
25–29 | N, column % | 85 (28.3) | 40 (30.5) |
≥ 30 | N, column % | 75 (25.0) | 29 (22.1) |
Maternal education (years) | |||
0–4 | N, column % | 39 (11.4) | 16 (11.1) |
5–7 | N, column % | 219 (63.9) | 91 (63.2) |
8–11 | N, column % | 64 (18.7) | 22 (15.3) |
12+ | N, column % | 21 (6.1) | 15 (10.4) |
Maternal BMI at baseline (kg/m2) | Mean, SD | 24.8 (4.1) | 24.5 (4.1) |
Maternal BMI categories (kg/m2) | |||
Less than 22.0 | N, column % | 77 (24.3) | 43 (32.3) |
22.0–24.9 | N, column % | 109 (34.4) | 38 (28.6) |
25.0–29.9 | N, column % | 101 (31.9) | 37 (27.8) |
30 or more | N, column % | 30 (9.5) | 15 (11.3) |
Maternal Hb at 6 weeks (gm/dL) | Mean, SD | 12.0 (1.6) | 12.5 (1.8) |
Maternal Hb categories at 6 weeks (gm/dL) | |||
Less than 8.5 | N, column % | 13 (3.8) | 2 (1.4) |
8.5–10.9 | N, column % | 58 (16.8) | 20 (13.7) |
11.0 or more | N, column % | 269 (78.0) | 121 (82.9) |
Infant gender | |||
Female | N, column % | 165 (47.8) | 76 (52.4) |
Male | N, column % | 180 (52.2) | 69 (47.6) |
Birth weight (kg) | Mean, SD | 3.2 (0.5) | 3.1 (0.5) |
Birth weight categories (kg) | |||
≤ 2.0 | N, column % | 7 (2.1) | 6 (4.3) |
2.001–2.499 | N, column % | 11 (3.3) | 7 (5.0) |
≥ 2.5 | N, column % | 320 (94.7) | 127 (90.7) |