Characteristic | Whole group | GROUP 1 No anaemia at first hospital appointment Hb ≥ 130 g/L | GROUP 2 Mild anaemia at first hospital appointment Hb 1109 - 129 g/L | GROUP 3 Moderate anaemia at first hospital appointment Hb 80 - 109 g/L | P value* |
---|---|---|---|---|---|
Third trimester - Gestation of haemoglobin measurement (weeks) | 27.6 (1.87) | 27.4 (1.7) | 27.6 (1.9) | 28.5 (2.4) | 0.0212 |
Third trimester - Haemoglobin concentration (g/L) | 114.6 (10.57) | 119.2 (8.4) | 112.2 (10.6) | 104.5 (9.3) | <0.0001 |
Third trimester – Women with anaemia Hb <130 (n, %) | 331/352a (94.0%) | 124/141 (87.9%) | 179/183 (97.8%) | 24/24 (100%) | 0.0005 |
Preoperative - Gestation at caesarean section (weeks) | 37.91 (2.79) | 38.0 (2.8) | 38.1 (2.6) | 36.9 (3.4) | 0.0835 |
Preoperative - Haemoglobin concentration (g/L) | 124.10 (12.42) | 128.2 (11.5) | 122.4 (11.6) | 111.5 (14.1) | <0.0001 |
Preoperative – Women with anaemia, Hb <130 (n, %) | 318/482b (66.0%) | 108/202 (53.5%) | 175/239 (73.2%) | 27/31 (87.1%) | <0.0001 |
Preoperative - Weight (kg) | 80.9 (16.80) | 82.3 (15.9) | 79.5 (17.7) | 82.0 (16.0) | 0.9959 |
Preoperative - Body mass index (kg/m2) | 30.5 (5.83) | 31.0 (5.7) | 29.9 (5.9) | 31.1 (5.7) | 0.2958 |
Preoperative – Classified as emergency caesarean section (n, %) | 271/486 (55.8%) | 116/204 (57%) | 131/239 (55%) | 18/33 (54.5%) | 0.9022 |
Intraoperative - Estimated blood loss (mL) | 438.6 (341.7) | 429.1 (225.9) | 448.3 (428.8) | 421.2 (236.2) | 0.8049 |
Postoperative - Hospital length of stay (days) | 4.1 (2.3) | 4.1 (2.1) | 4.1 (2.4) | 4.3 (2.8) | 0.901 |
Discharge - Haemoglobin concentration (g/L) | 108.0 (13.6) | 111.8 (13.0) | 105.7 (13.4) | 95.8 (11.9) | 0.0001 |
Discharge - Women with discharge anaemiac, Hb <130 g/L (n, %) | 193/202c (95.5%) | 82/88 (93%) | 95/98 (98%) | 10/10 (100%) | 0.3036 |