Introduction: The International Classification of Functioning, Disability and Health (ICF) offers a framework for describing functioning and disability in any health condition such as schizophrenia. 
Objectives: This study aims a) to identify the most common problems of patients with schizophrenia from the experts’ perspective using the ICF, and b) to compare health professions in terms of ICF categories reported as relevant for describing functioning in schizophrenia. 
Methods: Six 3-round worldwide electronic-mail surveys, based on a consensus-building Delphi method, were independently conducted with psychiatrists, psychologists, nurses, occupational therapists, social workers and physiotherapists experienced in the treatment of individuals with schizophrenia. Experts were asked about the problems they commonly treat in patients with schizophrenia. Participation was able in five languages: Chinese, English, French, Russian and Spanish. Experts’ responses were linked to the ICF system using stablished linking rules. 
Results: A total of 790 experts representing all six World Health Organization regions participated in the Delphi study, of whom 638 finished the third round. Health professionals identified a wide range of problems in functioning of persons with schizophrenia, specifically related to Body functions (e.g., attention), Activities and participation (e.g., interpersonal interactions), and Environmental factors (e.g., family support).
Conclusions: This study has identified the most common problems of patients with schizophrenia from the experts’ perspective. In general, the six different health professions coincide in most of the ICF categories reported as relevant for functioning in schizophrenia.

FUNCTIONING IN SCHIZOPHRENIA: COMPARISON BETWEEN SIX HEALTH PROFESSIONS