Associated Factors of Chronic Kidney Disease among Hyponatraemic Elderly Patients Attending a Primary Care Clinic

Introduction: Chronic kidney disease (CKD) emerges to be an important geriatric health issue. It may progress to end stage renal failure and affect the quality of life. However, little is known about the associated factors of CKD. So this study aimed to determine the associated factors of CKD among hyponatraemic elderly.   Methods: This is a retrospective study of hyponatraemic patients aged ≥ 60 years attending outpatient clinic in 2014. Blood test results of glucose, potassium, creatinine, medical history, blood pressure, medication and demographic data were captured from patient records. Each patient’s estimated glomerular filtration rate (eGFR) was calculated using the CKD-EPI Creatinine Equation. CKD is defined as eGFR of < 60 ml/min/1.73m2. SPSS 21 was used to do the analysis.   Results: Totally 257 patients with mean age of 72.9 ± 7.3 years were enrolled in this study. Of them 73 (28.4 %) elderly had CKD. The mean eGFR was 72.62 ± 24.14 ml/min/1.73m2, mean BP was (135.75 ± 18/10) mmHg. Of the participants, 134 (52.1 %) were men, 151 (58.8 %) were diabetics, 247 (96.1 %) had hypertension. The independent associated factors of CKD were increasing age (OR 1.08; 95 % CI 1.03-1.13; p = 0.002), hyperglycaemia (OR 1.10; 95 % CI 1.02-1.18; p = 0.017) and the use of loop diuretics (OR 5.15; 95 % CI 1.52-17.38; p = 0.008).   Conclusion: Hyperglycaemia and loop diuretics usage are found to be significantly associated with CKD among elderly patients attending a primary care clinic. Hence every effort should be made to optimise glucose control and cautious in the usage of loop diuretics to retard the decline in renal function.