Table 1.

Characteristics of the study population

Characteristic	Inpatients	Outpatients	P values
Number of individuals	778	5771
Per cent women	45.1	61.2	<0.0001
Age (years)	67 (7–90)	47 (13–82)	<0.0001
Total calcium (mmol/L)	2.22 (1.61–3.03)	2.31 (2.09–2.61)	<0.0001
Per cent hypocalcaemia	35.2	5.2	< 0.0001
Per cent hypercalcaemia	10.8	5.4	< 0.0001
Free calcium (mmol/L)	1.19 (0.85–1.67)	1.23 (1.13–1.39)	<0.0001
Per cent hypocalcaemia	41.7	9.2	< 0.0001
Per cent hypercalcaemia	11.3	5.3	< 0.0001
Albumin (g/L)	33 (18–45)	41 (34–46)	<0.0001
Per cent hypoalbuminaemia	60.0	4.9	< 0.0001
Per cent hyperalbuminaemia	0.6	2.0	0.0063
eGFR (mL/min/1.73 m2)	39 (7–171)	96 (19–154)	<0.0001
Per cent < 60	62.3	18.2	< 0.0001
Phosphate (mmol/L)	1.18 (0.48–2.68)	1.00 (0.64–1.54)	<0.0001

Continuous variables are given as medians (2.5–97.5 percentile).

eGFR, estimated glomerular filtration rate.