Descriptive statistics for haemoglobin concentrations in children at 8, 12, and 18 months of age and associations with confounding factors
| Haemoglobin concentrations (g/l) | |||
|---|---|---|---|
| 8 mth | 12 mth | 18 mth | |
| Overall | |||
| Mean (SD) | 117 (1.1) | 118 (1.0) | 117 (0.9) |
| N | 942 | 835 | 810 |
| Range | 72–153 | 72–147 | 75–176 |
| Confounders | |||
| Parity | |||
| 0 | 118 (1.2) | 119 (1.0) | 118 (1.0) |
| 1 | 116 (1.1) | 116 (1.0) | 116 (1.0) |
| 2+ | 116 (1.1) | 116 (1.0) | 116 (0.9) |
| 0.006 | <0.0001 | 0.006 | |
| Sex | |||
| Male | 117 (1.2) | 117 (1.0) | 116 (0.9) |
| Female | 117 (1.1) | 118 (1.0) | 117 (0.9) |
| 0.619 | 0.486 | 0.051 | |
| Ethnicity | |||
| White | 117 (1.1) | 118 (1.0) | 117 (1.0) |
| Non-white | 117 (1.4) | 119 (0.6) | 118 (0.8) |
| 0.9 | 0.7 | 0.7 | |
| Breast fed | |||
| No | 119 (1.0) | 119 (1.1) | 117 (0.9) |
| Yes | 117 (1.2) | 117 (1.0) | 117 (1.0) |
| 0.020 | 0.2 | 0.9 | |
| Smoking | |||
| No | 117 (1.2) | 117 (1.0) | 117 (0.9) |
| Yes | 118 (1.1) | 118 (1.0) | 117 (1.0) |
| 0.3 | 0.4 | 0.5 | |
| Maternal education | |||
| A | 117 (1.1) | 119 (0.9) | 117 (0.8) |
| B | 118 (1.2) | 116 (1.0) | 116 (1.2) |
| C | 117 (1.2) | 116 (1.0) | 116 (1.0) |
| D | 118 (1.1) | 118 (1.1) | 117 (0.8) |
| E | 116 (1.1) | 119 (1.0) | 119 (1.1) |
| 0.465 | 0.057 | 0.041 | |