Statistical Analysis
Changes in body weight and urine volume from BL to each time
point were analyzed by paired t-test. Data are expressed as
mean±standard deviation (SD). Congestive symptoms were
analyzed by chi-square or Fisher’s exact test. The evaluation of
lower limb edema and pulmonary congestion was by presence
and absence, and compared by chi-square test or Fischer’s exact
test.
The occurrence of hypernatremia was redefined for a risk
analysis when at least 1 measurement of serum sodium level was
≥150mEq/L throughout the tolvaptan treatment period. Predictive
factors that affect the occurrence of hypernatremia by
tolvaptan were extracted from variables by performing appro