Coon CD, Price MA, Nelson LM. Advanced patient-reported outcomes assessment: psychometric methods. Presented at the 2010 ISPOR 13th Annual European Congress; November 2010. Prague, Czech Republic.
Coon CD, Williams VSL, Nelson LM, Price MA. Determining missing data rules for patient-reported outcomes: alpha-if-item-deleted. Poster presented at the 2010 ISPOR 15th Annual International Meeting; May 26, 2010.
Nelson L, Coon C, Williams V, Price M. Determining missing data rules for pros: alpha-if-item-deleted. Poster presented at the 2010 ISPOR 15th Annual International Meeting; May 2010. Atlanta, GA. [abstract] Value Health. 2010 May; 13(3):A21.
Macdougall JE, Erder MH, Nelson LM, Price MA, Williams VS, Johnston JM. Correlational structure of IBS-C PRO symptom measures determined by exploratory factor analysis an relationship to global PRO assessments: results from a phase 2 trial of linaclotide in IBS-C. Poster presented at the 2009 NGM Scientific Meeting; 2009.