Prevalence of symptoms of depression among patients with chronic kidney disease.

OBJECTIVE

Depression is the most common psychiatric illness in patients with chronic kidney disease (CKD). Depression has been shown to affect mortality in end-stage renal disease patients. The objective of this study was to determine prevalence of depressive symptoms among CKD patients.

MATERIALS AND METHODS

A cross-sectional study of patients with CKD (Stages 3-5) attending the renal clinic of a tertiary hospital was conducted. Demographic and clinical data were documented. A self-administered Zung depression questionnaire was administered. The Zung depression questionnaire has 20 weighted questions. Individuals with a total score of 50 are considered to be depressed, while a score of 70 and above is indicative of severe depression.

RESULTS

One hundred and eighteen patients and fifty controls were interviewed. There were 73 (61.9%) males and 45 (38.1%) female patients. The mean age did not differ: males 43.8 ± 15.4 years, females 43.2 ± 14.7 yrs, P = 0.83. The prevalence of depression among the CKD patients was 23.7%, while for the control group was 2%; χ2 = 10.14, P < 0.001. Further analysis showed that CKD patients on dialysis were more likely to be depressed than the pre-dialysis patients with frequency of depressive symptoms of 34.5% for dialysis patients versus 13.3% in pre-dialysis patients; χ2 = 6.17, P = 0.01. No difference was observed in the mean Zung score among males, and female patients mean Zung score was 40.1 in females and 40.7 in male patients; P > 0.05.

CONCLUSION

Depression is highly prevalent among our patients with CKD and treatment modality was the major predictor of depression among our patients.