1. Development and validation of a postoperative nausea and vomiting intensity scale 
R Wengritzky, T Mettho, P.S. Myles, J Burke, A Kakos 
British Journal of Anaesthesia 
Volume 104, Issue 2, Pages (February 2010)
DOI: /bja/aep370
Copyright © 2010 The Author(s) Terms and Conditions

2. Fig 1
The Postoperative Nausea and Vomiting (PONV) Intensity Scale. The PONV Intensity Scale can be repeated at 24 and 72 h to measure later onset PONV.
British Journal of Anaesthesia  , DOI: ( /bja/aep370)
Copyright © 2010 The Author(s) Terms and Conditions

3. Fig 2
The risk (expressed as odds ratio) of having an adverse consequence of emesis in patients classified as having clinically important PONV using the PONV Intensity Scale.
British Journal of Anaesthesia  , DOI: ( /bja/aep370)
Copyright © 2010 The Author(s) Terms and Conditions