Twiss J, McKenna SP, Graham J, Swetz K, Sloan J, Gomberg-Maitland M. Applying Rasch analysis to evaluate measurement equivalence of different administration formats of the activity limitation scale of the Cambridge Pulmonary Hypertension Outcome Review (CAMPHOR). Health Qual Life Outcomes. 2016 Apr 9;14(1):57. doi: 10.1186/s12955-016-0462-2.
Cima K, Twiss J, Speich R, McKenna SP, Grunig E, Kahler CM, Ehlken N, Treder U, Crawford SR, Huber LC, Ulrich S. The German adaptation of the Cambridge pulmonary hypertension outcome review (CAMPHOR). Health Qual Life Outcomes. 2012 Sep 13;10:110. doi: 10.1186/1477-7525-10-110
McKenna SP, Wilburn J, Twiss J, Crawford SR, Hána V, Karbownik-Lewinska M, Popovic V, Pura M, Koltowska-Häggström M. Adaptation of the QoL-AGHDA scale for adults with growth hormone deficiency in four Slavic languages. Health Qual Life Outcomes. 2011 Aug 2;9:60. doi: 10.1186/1477-7525-9-60
Twiss J, Doward LC, McKenna SP, Eckert B. Interpreting scores on multiple sclerosis-specific patient reported outcome measures (the PRIMUS and U-FIS). Health Qual Life Outcomes. 2010 Oct 1;8:117.
Doward LC, McKenna SP, Meads DM, Twiss J, Revicki D, Wong RL, Luo MP. Translation and validation of non-English versions of the Ankylosing Spondylitis Quality of Life (ASQOL) questionnaire. Health Qual Life Outcomes. 2007 Feb;5(7).