Pre-operative Haemorrhagic Risk Screening, Using a Standardized Questionnaire Before Scheduled Surgeries

"This is not a validation study of a questionnaire. This is a multicenter diagnostic study, assessing the sensitivity and specificity of a simple structured questionnaire, to identify patients requiring further haemostatic investigations, in pre-operative patients. This study will also allow for the assessment of the sensitivity and specificity of the routine care strategy. All patients are recruited during the pre-anaesthesia visit by an anaesthesiologist, in different anaesthetic sectors each day of the week, so that different types of surgery are represented. Each day (from Monday to Friday), the first 2 eligible patients will be offered to take part in the study. Routine care strategy is not modified by the study protocol. In addition, the simple structured questionnaire will be completed by the patient with a research assistant after the pre-operative consultation As recommended in diagnostic studies, the gold standard (see secondary endpoint paragraph) will be performed consistently in all patients to avoid verification bias. The improvement of screening for the need of further investigations by use of the questionnaire compared to routine care will be measured counting how many patients are adequately reclassified with the questionnaire compared to the routine care strategy, regarding the gold standard (using the Net Reclassification Index)."