Thanks for the quick response. Due to language restrictions, I won't be able to understand the first article completely, but I got an overall idea, and the references provided will definitely be helpful.
I have three publications of the development and use of patient reported outcomes in hypertension care, you can reach them, through my profile here on RG. Further I provide some references I have used in my work, with regard to development of Patient reported outcome measures.:
Guidance för Industry - Patient-reported outcome measures: use in medical product development to support labeling claims. U.S. Department of Health and Human Services; Food and Drug Administration; 2009.
Patrick DL, Burke LB, Powers JH, Scott JA, Rock EP, Dawisha S, et al. Patient-Reported Outcomes to Support Medical Product Labeling Claims: FDA Perspective. Value in Health. 2007;10:S125-S37.
Donald P, Burke L, Gwaltney C, Kline Leidy N, Martin M, Molsen E, et al. Content Validity – establishing and reporting the evidence in newly developed patient-reported outcomes instruments for medical product evaluation: ISPOR PRO Good Research Practices Task Force Report: Part 1 – Assessing Respondent Understanding. Value Health. 2011;14:967-77.
Donald P, Burke L, Gwaltney C, Kline Leidy N, Martin M, Molsen E, et al. Content Validity - Establishing and Reporting the Evidence in Newly Developed Patient-Reported Outcomes (PRO) Instruments for Medical Product Evaluation: ISPOR PRO Good Research Practices Task Force Report: Part 2 – Assessing Respondent Understanding. Value Health. 2011;14:978-88.
You may be interested in checking out a new MOOC (massive open online course) from ScHARR, University of Sheffield on Measuring and Valuing Health. The course runs for 3 weeks (3 hours per week), is introductory level and is free for anyone to do online. It focuses on PROMS and QALYs. It starts on 23rd November 2015. Details, trailer & sign up here https://www.futurelearn.com/courses/valuing-health
Begin with the FDA PRO guidance and it will help you learn stepwise and then you can expand and go into depth at each step. for example - item generation - you can go into depth with references on what items, what instruments, how many domains, methodological issues. etc