Tonic-clonic seizures in patients taking sildenafil.

indicate continuing sequelae of the fracture or that people fracturing their neck of femur are more frail and ill than the general population of similar age. Measures of prognosis after fracture and comparisons between hospitals are substantially affected by whether death registration data are included, whether time intervals are extended beyond 30 days, and whether deaths that are not certified as fractured femur are included. When death registration data are available, one option is to confine analyses of mortality to the deaths attributed by the certifying clinician to the fracture. Our study confirms, however, that the fracture is often not recorded on death certificates even when death occurs soon after fracture. Studies of mortality after fractured femur will be misleading unless they include deaths after discharge from the initial admission and consider all causes of death.