Comparison of the Constipation Assessment Scale and Plain Abdominal Radiography in the Assessment of Constipation in Advanced Cancer Patients  Kittiphon Nagaviroj, MD, Woon Chai Yong, MD, Konrad Fassbender, PhD, George Zhu, MSc, Doreen Oneschuk, MD  Journal of Pain and Symptom Management  Volume 42, Issue 2, Pages 222-228 (August 2011) DOI: 10.1016/j.jpainsymman.2010.11.019 Copyright © 2011 U.S. Cancer Pain Relief Committee Terms and Conditions

Fig. 1 Plain film of the abdomen divided into four quadrants in preparation for scoring stool. Journal of Pain and Symptom Management 2011 42, 222-228DOI: (10.1016/j.jpainsymman.2010.11.019) Copyright © 2011 U.S. Cancer Pain Relief Committee Terms and Conditions

Fig. 2 Plots of correlation relationship between CAS scores and radiographic scores. Journal of Pain and Symptom Management 2011 42, 222-228DOI: (10.1016/j.jpainsymman.2010.11.019) Copyright © 2011 U.S. Cancer Pain Relief Committee Terms and Conditions