Secondary outcomes were total blood loss , total amount of blood transfused , occurrence of rebleeding , haemoglobin < @ g litre ( -@ ) , RBC transfusion within @ h , @ h , and @ days , and as a composite outcome of ` severe PPH ' , defined as a decrease in haemoglobin of > @ g litre ( -@ ) , transfusion of at least @ units of RBCs , haemostatic intervention ( angiographic embolization , surgical arterial ligation , or hysterectomy ) , or maternal death .