Table 4.

Moderately and severely low-serum electrolyte values with mortality (total participants=243)

Number of electrolyte values recorded	Number of moderately low values	Mortality	Number of severely low values	Mortality
Potassium	<3.4 mmol/l		<2.5 mmol/l
Baseline (n 243)	20	0	1	0
Day 3 (n 226)	22	0	3	0
Day 6 (n 180)	11	0	0	0
Day 9 (n 152)	7	1	1	0
Phosphate	<0.5 mmol/l		<0.32 mmol/l
Baseline (n 243)	7	1	3	0
Day 3 (n 222)	15	3	1	0
Day 6 (n 177)	4	0	0	0
Day 9 (n 151)	2	0	0	0
Magnesium	<0.6 mmol/l		<0.5 mmol/l
Baseline (n 243)	14	0	5	0
Day 3 (n 164)	5	0	2	0
Day 6 (n 132)	4	0	2	0
Day 9 (n 112)	5	0	3	0

Normal hospital reference ranges potassium 3.5–5.0 mmol/l, phosphate 0.8–1.4 mmol/l and magnesium 0.7–1.00 mmol/l.