Table 2.
Odds ratios (95% confidence interval) for allergic sensitisation associated with maternal first and last haemoglobin measurements in pregnancy (N = 4,235)a
| Model 1 Odds Ratio (95% CI) | Model 2 Odds Ratio (95% CI) | Model 3 Odds Ratio (95% CI) | |
|---|---|---|---|
| First haemoglobin | |||
| Per g/dL of haemoglobin | 0.91 (0.83, 0.98) | 0.91 (0.83, 0.99) | 0.91 (0.83, 0.99) |
| Quintiles of haemoglobin | |||
| 1st quintile | 1.06 (0.84, 1.34) | 1.06 (0.84, 1.34) | 1.06 (0.84, 1.34) |
| 2nd quintile | 1.24 (0.99, 1.55) | 1.27 (1.01, 1.59) | 1.28 (1.02, 1.61) |
| 3rd quintile (reference) | 1 | 1 | 1 |
| 4th quintile | 0.94 (0.74, 1.18) | 0.93 (0.74, 1.18) | 0.93 (0.74, 1.18) |
| 5th quintile | 0.92 (0.73, 1.17) | 0.94 (0.74, 1.19) | 0.94 (0.74, 1.20) |
| Last haemoglobin | |||
| Per g/dL of haemoglobin | 0.92 (0.85, 1.00) | 0.90 (0.83, 0.98) | 0.90 (0.83, 0.98) |
| Quintiles of haemoglobin | |||
| 1st quintile | 0.97 (0.78, 1.21) | 0.99 (0.79, 1.24) | 1.00 (0.80, 1.26) |
| 2nd quintile | 0.88 (0.71, 1.11) | 0.89 (0.71, 1.12) | 0.89 (0.71, 1.12) |
| 3rd quintile (reference) | 1 | 1 | 1 |
| 4th quintile | 0.85 (0.67, 1.06) | 0.83 (0.66, 1.05) | 0.83 (0.66, 1.05) |
| 5th quintile | 0.78 (0.62, 0.98) | 0.75 (0.59, 0.94) | 0.76 (0.60, 0.96) |
a
Model 1 is adjusted for offspring sex and gestational age at the time of the haemoglobin measure; Model 2 is additionally adjusted for maternal asthma, maternal eczema, maternal pre‐pregnancy BMI, maternal age, maternal parity, maternal smoking during pregnancy, maternal education, multiple pregnancy and maternal ethnicity; Model 3 is additionally adjusted for gestational age at birth and birthweight.