In the original version of this article [1], published on 12 September 2017, the explanation of a and b in the footnote of Table 2 were switched during typesetting. In this Correction Table 2, the incorrect and correct version of its footnote are shown. The affected part of the footnote is marked in italics. The original publication of this article has been corrected.

Table 2 Odds ratios of low or high plasma potassium associated with baseline patient characteristics – Multinomial logistic regression using patients with plasma potassium of 4–5 mmol/L as the reference group
Full size table
Table 2 Odds ratios of low or high plasma potassium associated with baseline patient characteristics – Multinomial logistic regression using patients with plasma potassium of 4–5 mmol/L as the reference group
Full size table

Originally Table 2 and its footnote were published as followed:

The analyses was adjusted for center

The correct version of Table 2 and its footnote is:

The analyses was adjusted for center