Nutritional Knowledge, Attitude, Eating Behavior, and Dietary Intake in Relation to Glycemic Control Among Patients with Type 2 Diabetes in Rural Thailand

Abstract

Objectives: Type 2 diabetes mellitus (T2DM) is an increasing public health concern in Thailand, particularly in rural communities where dietary practices and contextual factors may influence glycemic control. This study aimed to assess nutritional knowledge, attitude, and eating behavior using the Knowledge–Attitude–Practice (KAP) framework and to compare nutritional intake profiles between patients with controlled and uncontrolled glycemic status. Methods: A cross-sectional study was conducted among 70 patients with T2DM attending a health-promoting hospital in northeastern Thailand. Participants were classified into glycemic-controlled (GC; HbA1c < 7%, n = 36) and glycemic-uncontrolled (UC; HbA1c ≥ 7%, n = 34) groups. Data were collected using a semi-structured questionnaire covering demographics, anthropometry, body composition, biochemical parameters, and KAP domains. Dietary intake was assessed using three-day food records (two weekdays and one weekend day) and analyzed with the INMUCAL Nutrients program. Statistical analyses included descriptive statistics, group comparisons, logistic regression, and Spearman’s correlation. Results: Overall, participants demonstrated high levels of nutritional knowledge (71.4%) and fair attitude (52.9%), but moderate levels of appropriate eating behavior (58.6%). Eating behavior differed significantly between GC and UC groups (p = 0.038). The UC group consumed significantly higher amounts of total energy, carbohydrates, simple carbohydrates, and protein than the GC group. HbA1c and fasting blood glucose were positively correlated with total energy, carbohydrate, simple carbohydrate, and zinc intake, while protein and phosphorus intake were positively associated with fasting blood glucose only. Logistic regression analysis showed no significant associations between KAP domains and glycemic control. Conclusions: Glycemic control among rural Thai patients with T2DM was more closely related to dietary intake patterns than to nutritional knowledge or attitude alone, highlighting the need for context-specific, community-based dietary interventions.