Health Literacy, Self-Care Behaviors, and Biochemical Parameters Among Hypertensive Patients with Renal Complications in the Tai Lue Ethnic Community of Thailand

Purpose Hypertension (HT) can cause renal complications or deterioration of kidney function. HT management is very important because it reduces the severity of illnesses. This study aimed to investigate the relationship between health literacy (HL), self-care behaviors (SCB), and biochemical parameters in hypertensive patients with renal complications. Methods A cross-sectional study of 405 hypertensive patients with renal complications among Tai Lue people living in Thailand was conducted using simple random sampling. Face-to-face interviews with questionnaires were used to collect information. Blood pressure (BP) and biochemical parameters, such as fasting blood sugar (FBS) and estimated glomerular filtration rate (eGFR), were measured. Results The participants’ mean age was 68.3 years. A significant correlation was found between HL score, SCB score, systolic BP (SBP), diastolic BP (DBP), FBS, and eGFR (p<0.01). Multiple linear regression revealed that eating salty foods was a risk factor for SBP in males and for SBP and DBP in females. Body mass index (BMI) (B = 0.54), sweet food consumption (B = 13.90), and SCB score (B = −0.29) were significantly associated with FBS level (R2 = 17.8%, p<0.05). Employment (B = 2.55), eating bland food (B = 4.07), receiving information from family (B = 3.53), SCB (B= 0.31), and age (B = −0.51) were all significant factors for eGFR (R2 = 35.0%, p<0.05). Conclusion HL and SCB levels were associated with the health of hypertensive patients with renal complications in the Tai Lue ethnic community. The significance of organizing health education programs is to emphasize increasing HL to lead to self-care decisions and reduce complications in patients, resulting in improved SCB and quality of life in the future.