Table 2 Propensity Score Match
Anaemia HB < 110 g/L | No Anaemia HB ≥110 g/L | p-value | |
|---|---|---|---|
Number | 138 (50.0%) | 138 (50.0%) | – |
Age (years) | 30.7 (26.7–35.2) | 31.2 (27.9–34.2) | 0.82 |
Weight (kilograms) | 90.0 (72.0–107.0) | 83.5 (66.0–110.0) | 0.46 |
Body Mass Index (kg/m2) | 32.8 (27.1–38.9) | 31.7 (25.8–40.7) | 0.47 |
Body Mass Index Classification | 0.36 | ||
- Underweight | 1 (0.7%) | 5 (3.6%) | |
- Normal | 19 (13.8%) | 20 (14.5%) | |
- Overweight | 34 (24.6%) | 37 (26.8%) | |
- Obese | 84 (60.9%) | 76 (55.1%) | |
Ethnicity | 0.95 | ||
- African | 1 (0.7%) | 1 (0.7%) | |
- Chinese | 1 (0.7%) | 1 (0.7%) | |
- Indian | 12 (8.7%) | 17 (12.3%) | |
- Middle Eastern | 5 (3.6%) | 9 (6.5%) | |
- NZ European / Pakeha | 21 (15.2%) | 17 (12.3%) | |
- NZ Maori | 21 (15.2%) | 21 (15.2%) | |
- Other Asian | 5 (3.6%) | 7 (5.1%) | |
- Other European | 4 (2.9%) | 3 (2.2%) | |
- Pacific Islander | 64 (46.4%) | 57 (41.3%) | |
- South East Asian | 4 (2.9%) | 5 (3.6%) | |
Prior Pregnancies | |||
- Gravida | 3 (2–5) | 3 (2–5) | 0.58 |
- Para | 2 (1–3) | 1 (1–3) | 0.25 |
Number Prior Caesarean Sections | 1 (0–2) | 1 (0–2) | 0.80 |
Plurality | 0.52 | ||
- Singleton | 132 (95.7%) | 129 (93.5%) | |
- Twins | 6 (4.3%) | 8 (5.8%) | |
- Triplets or above | 0 (0.0%) | 1 (0.7%) | |
Gestation at Delivery (weeks) | 39.0 (38.1–39.3) | 39.0 (38.1–39.1) | 0.81 |
Singleton Foetal Weight (grams) | 3690 (3328–4010) | 3520 (3175–4010) | 0.20 |
Preoperative Blood Test Results | |||
- Haemoglobin (g/L) | 104 (100–107) | 119 (115–127) | < 0.001 |
- Haemoglobin < 120 g/L | 138 (100.0%) | 72 (52.2%) | < 0.001 |
- Ferritin Result Obtained | 85 (61.6%) | 97 (70.3%) | 0.16 |
- Ferritin (mcg/L) | 11 (7–20) | 19 (11–35) | < 0.001 |
- Ferritin < 30mcg/L | 70 (82.4%) | 65 (67.0%) | 0.03 |
Iron Therapy Pre-Operatively | |||
- No Iron | 59 (42.8%) | 46 (33.3%) | 0.14 |
- Oral Iron | 71 (51.4%) | 90 (65.2%) | 0.007 |
- Intravenous Iron | 22 (15.9%) | 3 (2.2%) | < 0.001 |
Length of Stay (hours) | 55.6 (52.1–77.7) | 56.2 (35.4–79.3) | 0.77 |
Postoperative Blood Test Results | |||
- Haemoglobin (g/L) | 97 (89–107) | 112 (105–120) | < 0.001 |
- Haemoglobin Measured | 135 (97.8%) | 135 (97.8%) | 1.00 |
- Change (Pre to Postoperative, g/L) | 5 (−2–11) | 8 (1–14) | 0.008 |
- Anaemia Postoperatively (110 g/L) | 117 (86.7%) | 59 (43.7%) | < 0.001 |
- Haemoglobin < 120 g/L | 133 (98.5%) | 99 (73.3%) | < 0.001 |
Blood Transfusion | 13 (9.4%) | 1 (0.7%) | 0.001 |
Critical Care Post-Partum | |||
- Intensive Care Unit | 1 (0.7%) | 0 (0.0%) | 1.00 |
- High Dependency Unit | 0 (0.0%) | 0 (0.0%) | – |
- Either / Both | 1 (0.7%) | 0 (0.0%) | 1.00 |
Infectious Complications Related to Pregnancy | 9 (6.5%) | 6 (4.3%) | 0.60 |