1. Evidence-based analysis of risk factors for postoperative nausea and vomiting† 
C.C. Apfel, F.M. Heidrich, S Jukar-Rao, L Jalota, C Hornuss, R.P. Whelan, K Zhang, O.S. Cakmakkaya 
British Journal of Anaesthesia 
Volume 109, Issue 5, Pages (November 2012)
DOI: /bja/aes276
Copyright © 2012 The Author(s) Terms and Conditions

2. Fig 1
Forest plot showing ORs and 95% CIs for the risk factor female gender for the endpoints PN and/or PONV and PV using inverse variance in a random effects model.
British Journal of Anaesthesia  , DOI: ( /bja/aes276)
Copyright © 2012 The Author(s) Terms and Conditions

3. Fig 2
Forest plot showing ORs and 95% CIs for the risk factors of gynaecological surgery, cholecystectomy, and laparoscopic procedures for the endpoint PN and/or PONV using inverse variance in a random effects model.
British Journal of Anaesthesia  , DOI: ( /bja/aes276)
Copyright © 2012 The Author(s) Terms and Conditions

4. Fig 3
Funnel plot of the effect of gynaecological surgery, cholecystectomy, and laparoscopic procedures on PN and/or PONV endpoint.
British Journal of Anaesthesia  , DOI: ( /bja/aes276)
Copyright © 2012 The Author(s) Terms and Conditions