Impaired Saltiness Perception Contributes to Higher Sodium Intake Among Patients With Chronic Kidney Disease: A...

Area of Science:

• Nephrology
• Sensory Science
• Public Health

Background:

• Dietary sodium restriction is crucial for managing chronic kidney disease (CKD) prognosis.
• The relationship between saltiness perception and sodium intake in CKD patients remains unclear.
• Factors influencing saltiness perception in this population require further investigation.

Purpose of the Study:

• To evaluate saltiness perception in patients with chronic kidney disease (CKD) using a cost-effective test.
• To determine the association between saltiness perception and daily sodium intake.
• To identify factors influencing saltiness perception in CKD patients.

Main Methods:

• A cohort of 132 CKD outpatients (not on dialysis) from two medical centers participated.
• Saltiness perception was assessed using a sodium solution test (25 mM sodium).
• Daily sodium intake was measured via 24-hour urine collections.

Main Results:

• Median daily sodium intake was 3.36 g/day.
• Impaired saltiness perception significantly increased with higher sodium intake groups (6.8% in low intake vs. 86.4% in high intake, P < 8.035 × 10^-14).
• Smoking (current or former) and nonadherence to sodium restriction were significant predictors of impaired saltiness perception.

Conclusions:

• A clear link exists between elevated daily sodium intake and diminished saltiness perception in CKD patients.
• Smoking habits and nonadherence to dietary sodium restriction are key factors associated with impaired saltiness perception.
• These modifiable factors present opportunities for intervention through nutritional counseling and public health education.