a nonsignificant trendP = 0.32
There was a nonsignificant trend toward a decrease in the median sodium fractional excretion after dDAVP injection in patients affected by central diabetes insipidus, from 1.22% to 0.44% ( P = 0.32) and remained stable in patients affected by nephrogenic diabetes insipidus (1.42% to 1.39%, P = 0.32, Fig. 1 ).