Nonadherence to dialysis among saudi patients – Its prevalence, causes, and consequences

Dialysis nonadherence among Saudi hemodialysis (HD) patients has not been studied previously. We study its prevalence, causes, and consequences. All chronic HD patients at our center were enrolled. Their demographics as well as levels of hemoglobin (Hb), Kt/v, potassium, and phosphate; dialysis type; dialysis vintage; duration; and shift were recorded. Nonadherence, defined as missed dialysis session or patient-derived shortening of the dialysis session by >10 min at least once over a month's period, was recorded. We analyzed the relationship of nonadherence to emergency room visits, hospitalizations, interdialytic weight gain (IDWG), intradialytic symptoms, home-to-hospital distance, and smoking habits. Two hundred and sixty-five patients were included; their mean age was 61.8 ± 18.2 years, 47.3% were male, dialysis vintage was 3.8 ± 3.3 years, 5.9% were on HD, and 34.1% were on hemodiafiltration. During the study period, the nonadherence rate was 25% for missed dialysis sessions and 72% for shortened dialysis on at least one occasion. Nonadherence was more likely to occur in males than females (75% and 66%, respectively, P = 0.05), in smokers (57.1% vs. 21.7%, P = 0.0003), and in night shifts rather than day shifts (33.6% vs. 20.6%, P = 0.042). Nonadherent patients had lower Kt/V than adherent patients (1.22 ± 0.2 and 1.31 ± 0.2, respectively P = 0.01), had higher mean IDWG (2.7 ± 1.0 and 2.4 ± 1.0 kg, respectively, P = 0.02), and are more likely to be hospitalized (50% vs. 32%, P = 0.01). On the other hand, no differences were observed in serum phosphate, potassium, or Hb levels; intradialytic symptoms; education; employment; the distance between the dialysis unit and home; type of dialysis; Charlson Comorbidity Index; or the dialysis vintage. The prevalence of nonadherence in our group was comparable to that of other reports and is more likely to occur in male patients, smokers, and those in night shifts. It is associated with lower dialysis adequacy, higher mean IDWG, and higher hospitalization rate.