Crude and adjusted ORs and 95% CIs for excess weight loss (>7%) according to doses of intrapartum intravenous fluid received by mothers for caesarean section
| 24 hours post partum | 48 hours post partum | 72 hours post partum | |||||||
| No. of cases (%) | Model 1 (crude) OR (95% CI)* | Model 3 Adjusted OR (95% CI)* | No. of cases (%) | Model 1 (crude) OR (95% CI) | Model 3 Adjusted OR (95% CI) | No. of cases (%) | Model 1 (crude) OR (95% CI) | Model 3 Adjusted OR (95% CI)* | |
| Regression models for type-specific doses of intravenous fluid | |||||||||
| Colloids doses (in mL) | |||||||||
| 0 | 12 (2.0) | Reference | Reference | 252 (41.9) | Reference | Reference | 260 (53.8) | Reference | Reference |
| >0–500 | 2 (4.4) | 3.3 (0.6 to 11.8) | 2.7 (0.4 to 11.5) | 17 (37.0) | 0.9 (0.5 to 1.7) | 1.0 (0.5 to 2.1) | 20 (55.6) | 1.1 (0.6 to 2.3) | 1.3 (0.6 to 2.9) |
| >500 | 1 (0.8) | 0.7 (0.1 to 2.8) | 0.7 (0.1 to 3.1) | 48 (39.7) | 0.9 (0.6 to 1.4) | 1.0 (0.6 to 1.5) | 70 (62.5) | 1.4 (0.9 to 2.1) | 1.3 (0.8 to 2.1) |
| Crystalloids doses (in mL) | |||||||||
| 0 | 0 (0.0) | Reference | Reference | 6 (37.5) | Reference | Reference | 9 (75.0) | Reference | Reference |
| >0–1000 | 3 (1.4) | N/A | N/A | 92 (43.0) | 1.1 (0.4 to 3.4) | 0.8 (0.2 to 2.6) | 93 (54.1) | 0.5 (0.1 to 1.9) | 0.2 (<0.1 to 1.1) |
| >1000–2000 | 10 (2.6) | N/A | N/A | 156 (40.1) | 1.0 (0.3 to 3.0) | 0.6 (0.2 to 2.0) | 179 (56.7) | 0.5 (0.1 to 2.1) | 0.2 (<0.1 to 0.9) |
| >2000 | 1 (0.8) | N/A | N/A | 56 (44.8) | 1.2 (0.4 to 3.8) | 0.9 (0.2 to 3.0) | 61 (55.0) | 0.5 (0.1 to 2.1) | 0.3 (<0.1 to 1.2) |
| Regression models for total doses of intravenous fluid | |||||||||
| Total intravenous fluid doses (in mL) | |||||||||
| >0–1000 | 3 (1.7) | Reference | Reference | 82 (44.8) | Reference | Reference | 81 (55.5) | Reference | Reference |
| >1000–2000 | 8 (2.0) | 1.1 (0.3 to 4.4) | 1.1 (0.3 to 4.5) | 161 (39.3) | 0.8 (0.6 to 1.1) | 0.7 (0.5 to 1.0) | 183 (56.0) | 1.0 (0.7 to 1.5) | 0.8 (0.5 to 1.2) |
| >2000–3000 | 3 (2.2) | 1.3 (0.3 to 6.3) | 1.2 (0.2 to 6.1) | 64 (45.7) | 1.0 (0.7 to 1.6) | 1.0 (0.6 to 1.6) | 71 (55.9) | 1.0 (0.6 to 1.6) | 0.9 (0.5 to 1.6) |
| >3000 | 0 (0.0) | N/A | N/A | 3 (27.3) | 0.5 (0.1 to 1.8) | 0.5 (0.1 to 2.0) | 7 (63.6) | 1.4 (0.4 to 5.0) | 1.1 (0.3 to 4.6) |
Model 2 adjusted results were similar to the adjusted results of model 3 (only results from model 3 are presented in the table; results of model 2 are available on request).
Model 2 adjusted for maternal age, gestational diabetes, hypertension during pregnancy, number of pregnancies, viable births, lost pregnancies, gestational age, pre-eclampsia, cigarette smoking, alcohol use, drug use, epidural before caesarean section and election to have a caesarean section.
Model 3 adjusted for maternal age, gestational diabetes, hypertension during pregnancy, number of pregnancies, viable births, lost pregnancies, gestational age, pre-eclampsia, cigarette smoking, alcohol use, drug use, epidural before caesarean section, election to have a caesarean section, Apgar score, exclusive breast feeding, number of stools, number of urine, presence of fever and phototherapy.
N/A, not applicable.
*Firth penalised maximum likelihood estimation method was used for quasi-complete separation.