Cornette 2002.

Study characteristics
Methods	RCT
Participants	44 women were randomised. Setting: authors from Belgium (no further details provided). Study dates: not reported. Inclusion criteria: women with full‐term singleton pregnancies admitted for elective caesarean section. Exclusion criteria: women with known bleeding or coagulation disorders.
Interventions	Group 1 (n = 22): preoperative, 0.3 mL nadroparin calcium (LMWH), administered 12 hours before elective caesarean birth. Group 2 (n = 22): postoperative, 0.3 mL (2850 IU) nadroparin calcium, administered 12 hours after elective caesarean birth. All women received the same fluid regimen before, during and after surgery. Women were allowed to drink freely 6 hours after surgery. It was not clear whether participants received any further doses of LMWH after initial dose.
Outcomes	Review outcomes reported: none. Other outcomes reported: Hb and haematocrit concentrations 12 hours before and 48 hours after surgery (as a substitute for blood loss).
Notes	No outcomes included in the review analysis as outcomes were not relevant to the review. The power calculation was based on changes in Hb levels. Funding sources: not reported. Declarations of interest: not reported.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described, quote: "randomly divided in two groups".
Allocation concealment (selection bias)	Unclear risk	As above.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding not possible due to nature of the intervention.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No detail of blinding of outcome assessors.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No loss to follow‐up apparent.
Selective reporting (reporting bias)	Unclear risk	No trial protocol to confidently assess selective reporting; furthermore, no relevant outcome data were reported.
Other bias	Low risk	No other obvious risk of bias identified.