Table 2.

Percentage (%) of cases with missing data for specific variables in the original APPROACH database

		FISCAL YEAR
		ICD-9-CM							ICD-10
CLINICAL VARIABLES	TOTAL	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005
N	86,649	6,348	6,131	6,242	6,718	8,110	8,469	8,479	8,767	8,835	9,257	9,293
Dialysis (%)	11.5	4.7	2.8	2.5	3.6	4.9	2.1	24.1	11.0	20.7	21.5	18.2
Diabetes Type I (%)	6.5	4.7	2.8	2.5	3.6	2.9	0.9	14.4	8.8	7.8	10.0	9.2
Renal (Creatinine > 200 mmol/L) (%)	29.8	20.8	12.7	15.3	28.8	59.5	43.2	32.3	26.7	25.1	24.6	30.0
Malignancy/Metastatic Disease (%)	10.4	7.0	5.7	5.9	5.9	5.1	2.1	20.5	17.7	14.4	11.7	13.5
Prior CABG (%)	9.2	20.8	11.1	10.4	10.9	12.2	6.3	1.1	0.1	10.0	12.4	10.3
Liver/GI (%)	11.1	0.2	0.1	5.4	5.9	5.1	2.1	39.1	16.4	13.2	11.3	13.8
Prior PCI (%)	9.3	19.3	11.3	10.1	11.0	12.7	6.6	1.2	0.2	10.0	12.8	12.1
Cerebrovascular Disease (%)	10.8	4.7	2.8	2.5	3.6	4.9	2.1	11.9	11.3	21.3	23.7	20.1
PVD (%)	10.4	4.7	2.8	2.5	3.6	4.9	2.1	12.0	11.3	21.4	21.0	18.6
Pulmonary Disease (%)	9.3	7.0	5.7	5.9	5.9	5.1	2.1	17.6	14.2	11.7	11.0	12.5
Congestive heart failure (%)	14.1	20.6	17.3	8.3	10.7	16.0	10.2	12.5	10.8	17.2	17.5	14.4
Diabetes Type II (%)	6.7	4.7	2.8	2.5	3.6	2.9	0.9	14.7	8.9	7.6	10.3	10.1
Prior MI (%)	15.8	19.3	15.9	9.5	12.2	16.6	11.4	17.7	18.2	19.1	17.5	14.9
Hypertension (%)	11.2	14.9	12.4	7.8	10.8	15.1	10.9	11.5	10.0	8.7	12.2	9.3
Hyperlipidemia (%)	17.4	28.0	26.8	19.9	20.8	22.7	17.1	14.8	12.9	13.2	12.1	11.0
Proportion with one or more missing	58.9	48.2	45.8	39.5	49.5	72.3	58.3	74.1	60.0	64.8	60.2	61.3