title: Predictive factors of postoperative pain after day-case surgery.
abstract: OBJECTIVE
  Despite the growing number of ambulatory operations knowledge of predictive factors of postoperative pain after ambulatory surgery is limited. Therefore, the aim of this study was to identify predictive factors of postoperative pain after ambulatory surgery.
  
  
  METHODS
  In this cross-sectional study, 648 patients were included. A wide variety of elective ambulatory operations were performed. Pain assessments were made before the operation and during a 4-day period postoperatively, using a 100 mm visual analog scale. Patient characteristics, type of surgery, and type of anesthesia were recorded. In addition, preoperative expectations of postoperative pain by physician and patient were assessed. Finally, several scores about psychologic parameters were measured: pain catastrophizing, surgical anxiety, and optimism. Stepwise logistic regression analysis was performed to identify factors that independently predict the risk of having postoperative pain (defined by a visual analog scale >40 mm) on days 0 to 4.
  
  
  RESULTS
  The most important predictor of postoperative pain was the presence of preoperative pain. Other predictors were anticipated postoperative pain by the clinician, preoperative high expectations of postoperative pain by the patient, younger age, and fear of short-term consequences of the operation. Regional anesthetic technique compared with general anesthesia decreased the risk of acute postoperative pain only on the day of the operation.
  
  
  CONCLUSIONS
  Several predictive factors of postoperative pain after ambulatory surgery were identified in this study. These factors should be taken into account when planning postoperative analgesia for ambulatory surgery.
authors: Department of Anesthesiology and Pain Therapy, University Hospital Maastricht, Maastricht, The Netherlands. hgra@sane.azm.nl
authors: Hans-Fritz
authors: HF
authors: Gramke
authors: Janneke M
authors: JM
authors: de Rijke
authors: Maarten
authors: M
authors: van Kleef
authors: Alfons G H
authors: AG
authors: Kessels
authors: Madelon L
authors: ML
authors: Peters
authors: Michael
authors: M
authors: Sommer
authors: Marco A E
authors: MA
authors: Marcus
mesh_terms: D000328:Adult; D000367:Age Factors; D000556:Ambulatory Surgical Procedures / Q000706:statistics & numerical data*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement / Q000379:methods; D010149:Postoperative Pain / Q000453:epidemiology* / Q000209:etiology*; D011237:Predictive Value of Tests; D055815:Young Adult