Fig. 1From: Long-term changes in dysnatremia incidence in the ICU: a shift from hyponatremia to hypernatremiaTime course of sodium derangements. Comparison of the development of hyponatremia and hypernatremia between the periods 1992–1996 and 2009–2012. Sodium levels within the reference range are shown in green and progressively more marked derangements in yellow, orange, and red, respectivelyBack to article page