Table 2: Causes of hyponatremia in the tolvaptan and control group.

Cause of Hyponatremia Tolvaptan Group Number (%) Control Group Number (%)
SIADH 23 (57.5) 5 (12.5) (p<0.001)
CHF 9 (22.5) 1 (2.5) (p<0.01)
Cirrhosis 1 (2.5) 2 (5.0) NS
Renal disease 1 (2.5) 4 (10.0) NS
Beer potomania 1 (2.5) 1 (2.5) NS
Diarrhea 0 (0.0) 4 (10.0) NS
Mixed cardio and renal 0 (0.0) 2 (5.0) NS
Medication 0 (0.0) 1 (2.5) NS
Unclear Etiology 5 (12.5) 20 (50.0) (p<0.001)
Total 40 (100) 40 (100)