[1] Originalpublikation
Apfel CC, Läärä E, Koivuranta M, Greim CA, Roewer N. A simplified risk score for predicting postoperative nausea and vomiting: conclusions from cross-validations between two centers. Four predictors — female sex, non-smoking, history of PONV or motion sickness, postoperative opioids — with incidences of about 10, 21, 39, 61 and 79 % for 0–4 factors.
Anesthesiology, 1999