Measurement of Somatic Symptoms in the General Population: Standardization of the Russian PHQ-15

The Patient Health Questionnaire (PHQ-15) is a self-report measure assessing presence and severity of somatic symptoms [15]. The aim of this study was to standardize the Russian version of PHQ-15. The study included 1157 respondents from the general population aged 18 to 71. In addition to the PHQ-15, the participants completed the Russian Depression, Anxiety, and Stress Scales-21 (DASS-21), evaluating the psychological distress symptoms. The results showed that 91% of the respondents reported at least one symptom bothering them in the past four weeks. Regarding gender and age specifics of somatization, the most predisposed to the psychosomatic burden were females and persons aged 35-49 years. Moreover, 28.2% of the respondents demonstrated a high level of somatization, as well as increased scores of depression, anxiety, and stress compared to the participants with low and moderate psychosomatic burden. In conclusion, the Russian version of PHQ-15 has been successfully standardized and can be recommended for screening and monitoring of medically unexplained symptoms.