Development and validation of a patient self-assessed questionnaire on satisfaction with communication of the multiple sclerosis diagnosis

A. Solari, K. Mattarozzi, L. Vignatelli, A. Giordano, Pm Russo, M. Messmer Uccelli, R. D'Alessandro

Research output: Contribution to journalArticlepeer-review


Background: We describe the development and clinical validation of a patient self-administered tool assessing the quality of multiple sclerosis diagnosis disclosure. Method: A multiple sclerosis expert panel generated questionnaire items from the Doctor's Interpersonal Skills Questionnaire, literature review, and interviews with neurology inpatients. The resulting 19-item Comunicazione medico-paziente nella Sclerosi Multipla (COSM) was pilot tested/debriefed on seven patients with multiple sclerosis and administered to 80 patients newly diagnosed with multiple sclerosis. The resulting revised 20-item version (COSM-R) was debriefed on five patients with multiple sclerosis, field tested/debriefed on multiple sclerosis patients, and field tested on 105 patients newly diagnosed with multiple sclerosis participating in a clinical trial on an information aid. The hypothesized monofactorial structure of COSM-R section 2 was tested on the latter two groups. Results: The questionnaire was well accepted. Scaling assumptions were satisfactory in terms of score distributions, item-total correlations and internal consistency. Factor analysis confirmed section 2's monofactorial structure, which was also test-retest reliable (intraclass correlation coefficient [ICC] 0.73; 95% CI 0.54-0.85). Section 1 had only fair test-retest reliability (ICC 0.45; 95% CI 0.12-0.69), and three items had 8-21% missed responses. Conclusions: COSM-R is a brief, easy-to-interpret MS-specific questionnaire for use as a health care indicator.

Original languageEnglish
Pages (from-to)1237-1247
Number of pages11
JournalMultiple Sclerosis Journal
Issue number10
Publication statusPublished - Oct 2010


  • diagnosis communication
  • multiple sclerosis
  • patient satisfaction
  • patient-reported outcomes
  • psychometrics
  • validation studies

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology


Dive into the research topics of 'Development and validation of a patient self-assessed questionnaire on satisfaction with communication of the multiple sclerosis diagnosis'. Together they form a unique fingerprint.

Cite this