Association between Hb concentration and BSID scores (n=1808)
| MDI score* | PDI score | |||
|---|---|---|---|---|
| Coefficient (95% CI) | p Value | Coefficient (95% CI) | p Value | |
| Hb concentration (g/L) | 0.09 (0.03 to 0.15) | <0.01 | 0.10 (0.04 to 0.16) | <0.01 |
| Sex (female=1) | 1.31 (−0.16 to 2.78) | 0.08 | 0.44 (−1.05 to 1.93) | 0.56 |
| Infant age (6 months is base) (months) | ||||
| 7 | 9.05 (5.56 to 12.53) | <0.01 | 6.20 (3.30 to 9.10) | <0.01 |
| 8 | 7.79 (4.38 to 11.20) | <0.01 | 4.06 (1.09 to 7.03) | <0.01 |
| 9 | 6.69 (3.17 to 10.21) | <0.01 | −0.65 (−3.89 to 2.58) | 0.69 |
| 10 | 5.92 (2.34 to 9.49) | <0.01 | −7.69 (−11.0 to −4.35) | <0.01 |
| 11 | 4.78 (1.45 to 8.12) | <0.01 | −2.04 (−5.36 to 1.28) | 0.23 |
| Is the infant premature? (yes=1) | −1.70 (−6.10 to 2.69) | 0.45 | 0.76 (−2.71 to 4.23) | 0.67 |
| Birth order of infant (second or higher=1) | −0.83 (−2.79 to 1.14) | 0.41 | −1.37 (−3.41 to 0.67) | 0.19 |
| Mother is primary caregiver (yes=1) | 0.55 (−1.49 to 2.59) | 0.60 | 1.40 (−0.85 to 3.65) | 0.22 |
| Maternal educational level (more than 9 years=1) | 0.96 (−0.93 to 2.85) | 0.32 | 2.41 (0.51 to 4.30) | 0.01 |
| Maternal age (more than 25 years=1) | −1.19 (−3.12 to 0.73) | 0.22 | −0.94 (−2.86 to 0.98) | 0.34 |
| Family receives minimum living standard guarantee (yes=1) | −0.42 (−2.16 to 1.32) | 0.64 | −0.71 (−2.58 to 1.17) | 0.46 |
*In addition to the covariates presented, the multiple linear regressions also adjust for county fixed effects. SEs account for clustering at the village level.
BSID, Bayley Scales of Infant Development; Hb, haemoglobin; MDI, Mental Development Index; PDI, Psychomotor Development Index.