Table 3:

Selected datasets for assessing granularity of chronic kidney disorder.

Levels of separation	DA France	JMDC	LPD Australia	AmbEMR	CUMC	MDCD	Average*
0;Renal impairment			23%	4%	0.01%		2.2%
1; Chronic kidney disease	94%	90%	32%	17%	25%	13%	24.7%
2; Chronic kidney disease stage 3	5%	9%	45%	69%	64%	68%	59.4%
3;Chronic kidney disease stage 3 due to hypertension	0.04%	1%		10%	9%	19%	13.1%
4;Malignant hypertensive chronic kidney disease stage 3	0.04%	0.1%		0.2%	1%	1%	0.5%
5;Malignant hypertensive end stage renal disease on dialysis				0.01%			0.0001%

^*Average frequency of concepts at a level across all databases