According to the World Health Organization (WHO), complementary and alternative medicine (CAM) encompasses a broad set of health care practices that are not part of a country's traditional or conventional medicine and are not fully integrated into the prevailing health care system. The aim of this study is the linguistic and cross-cultural adaptation of the Polish version of the International Questionnaire to Measure Use of Complementary and Alternative Medicine (I-CAM-Q) and the assessment of the occurrence and factors related to CAM among patients in Poland. A methodological model of translation and cross-cultural adaptation of research tools according to Beaton et al. with a Delphi-Technique was used for the linguistic and cultural adaptation of the Polish version of I-CAM-Q. The Delphi consensus was achieved in the scale assessment between the experts in two rounds (with a score of above 80% of expert agreement). Data was collected using an online survey within 38 thematically different groups on Facebook, among 524 participants. Over half (59.7%, n = 313) of the respondents used the services of at least one CAM practitioner. On the other hand, 50.8% (n = 266) of the respondents declared using physician's advice. The use of herbs and plant products was reported by 84.7% (n = 444), and vitamins and minerals by 88.4% (n = 463) of respondents. The most commonly used self-help practices among the respondents were relaxation techniques (49.6%), praying for one's health (43.3%) and meditation (41.2%). The consensual methodology of validating the Polish version of the I-CAM-Q scale allowed for creation of a conceptually and linguistically equivalent tool with the original international instrument. A high frequency of CAM use was found among the respondents. Therefore, strategies should be implemented to improve patient-physician communication on the use of CAM in Poland.
Keywords: complementary and alternative medicine; cross-sectional study; linguistic and intercultural adaptation; questionnaire I-CAM-Q.