Table 3.

Two-by-two table based on a cut-off value for urine osmolality of >680 mOsmol/kg.

	Clinical diagnosis
DI	No DI	Total
First criterion reached
Maximum urine osmolality >680 mOsmol/kg	0	27	27
Plasma osmolality >300 mOsmol/kg or weight loss >5%	13	0	13
Total	13	27	40

DI, diabetes insipidus.