2460 records were introduced in the database, including the C-section and fentanyl values. Of those, 229 were excluded, 58 because of incomplete data, 11 because of vaginal delivery, 36 because of non-C-section surgeries, 14 because of fetal death, 92 with multiple pregnancy, and 17 that received only regional peridural anesthesia.
Se introdujeron en la base de datos 2.460 registros con los valores de cesárea y fentanilo; de ellos, se excluyeron 229 registros 58 por datos incompletos, 11 por parto vaginal, 36 correspondientes a otras cirugías no cesáreas, 14 por óbito fetal, 92 con embarazo múltiple y 17 que recibieron anestesia regional peridural exclusiva.