Objectives: Obesity is a significant public health concern, as it is associated with the development of numerous chronic diseases. The prevalence of obesity and attendant diseases has been increasing over recent years. This study attempted to ascertain the frequency of chronic diseases in obese patients in Türkiye for the first time on this scale. Methods: A retrospective study was conducted, with patients admitted to the internal medicine outpatient clinics or obesity centers between December 2023 and December 2024 included in this study. Participants were recruited from seven regions, 20 provinces, and 28 centers, and the inclusion criteria were met by those aged 18 years and over with a body mass index (BMI) of 30 kg per square meter (kg/m²) or above. Their status, with respect to chronic diseases, and their anthropometric parameters were documented. Results: The total number of patients was 10,121, with a mean age of 45.2 ± 13.92. Of these, 7222 (71.35%) were female. The prevalence of type 2 diabetes mellitus (T2DM), hypertension (HT), dyslipidemia (DL), coronary artery disease (CAD), obstructive pulmonary disease (OPD), obstructive sleep apnea syndrome (OSAS), and fatty liver disease (FLD) was found to be 35.01%, 78.19%, 12.37%, 10.32%, 5.88%, and 75.12%, respectively. A subsequent analysis of the prevalence of these diseases by region revealed a statistically significant variation between regions (p < 0.001 for all regions). Conclusions: This study represents a substantial contribution to the existing body of knowledge in this field, particularly with regard to the identification of the current chronic disease rate of obese patients in Türkiye.

Background: Weight misperception (WM) is common among adults, and it is associated with adverse health outcomes. Research has shown that various factors are associated with weight misperception. Turkish adult population data for weight misperception and related factors do not exist. Methodology: We conducted a face-to-face cross-sectional descriptive survey in the general internal medicine outpatient clinics of two academic centers. Perception was analyzed both verbally and visually. Misperception was defined for both verbal and visual scales as being thinner than reality misperceptions (TTRM), fatter than reality misperceptions (FTRM), or either of them (ETFTRM). Demographics, anthropometrics, and social determinants of health were analyzed in different misperception groups. Results: 250 patients participated in the study. The median (interquartile range) age was 55 (14), and the BMI was 28.2 (6.9) for females and 26.9 (4.4) for males. 81.2% had ETFTRM, 45.2% had TTRM, and 22.4% had FTRM. Age and BMI were higher in the ETFTRM and TTRM groups, while education level was lower in both. Multivariate logistic regression showed that higher age, higher BMI, and lower education levels were associated with higher TTRM. Discussion: WM is common among the Turkish adult population. Similar to the previous studies, aging, high BMI, and low education levels are associated with weight misperception. However, in contrast to previous studies, gender, marital status, and employment were not associated with weight misperception in our cohort.