Table 1.

General patient population characteristics and distribution of KD and ARF hospital admissions, per year

General population	2008	2009	2010	2011	2012	2013	Mean
No of patients hospitalised (n, all causes)	5 287 364	5 232 412	5 170 695	5 193 430	5 217 264	5 163 969	5 210 856
Sex ratio (male, %/female, %)	47.3/52.7	48.1/51.9	48.0/52.0	47.9/52.1	47.7/52.3	47.8/52.2	47.8/52.2
Age (mean, years)	59±20	59±20	60±20	60±20	60±20	61±20	60±20
No of patients hospitalised (for more than 24 hours for KD, n, % general population)	102 420 (1.9)	106 853 (2.0)	109 931 (2.1)	113 492 (2.2)	118 000 (2.3)	122 515 (2.4)	112 202 (2.2)
Sex ratio (male, %/female, %)	53.0/47.0	52.9/47.1	52.7/47.3	52.7/47.3	52.6/47.4	52.4/47.6	52.7/47.3
Age (mean, years)	64±18	64±18	65±18	65±18	65±18	66±18	65±18
No of patients hospitalised (for more than 24 hours for ARF, n, % of general population)	15 993 (0.3)	17 473 (0.3)	16 567 (0.3)	16 491 (0.3)	17 082 (0.3)	17 478 (0.3)	16 847 (0.3)
Sex ratio (male, %/female, %)	59.2/40.8	58.5/41.5	59.6/40.4	59.2/40.8	59.4/40.6	59.6/40.4	59.3/40.7
Age (mean, years)	71±15	71±15	71±15	71±15	71±14	71±15	71±15

The proportion of patients hospitalised for KD rose progressively from 1.9% in 2008 to 2.4% in 2013: Cochran-Armitage test, p<0.0001.

ARF, acute renal failure; KD, kidney disease.