Information Technology Reference
In-Depth Information
Table 1. Definition of Charlson index
Condition
ICD9 Codes
Weights
Acute myocardial infarction
410, 412
1
Congestive heart failure
428
1
Peripheral vascular disease
441,4439,7854,V434
1
Cerebral vascular accident
430-438
1
Dementia
290
1
Pulmonary disease
490,491,492,493,494,495,496,500,501,502,503,504,505
1
Connective tissue disorder
7100,7101,7104,7140,7141,7142,7148,5171,725
1
Peptic ulcer
531,532,533,534
1
Liver disease
5712,5714,5715,5716
1
Diabetes
2500,2501,2502,2503,2507
1
Diabetes complications
2504,2505,2506
2
Paraplegia
342,3441
2
Renal disease
582,5830,5831,5832,5833,5835,5836,5837,5834,585,586,588
2
Cancer
14,15,16,17,18,170,171,172,174,175,176,179,190,191,193,
194,1950,1951,1952,1953,1954,1955,1958,200,201,202,203,
204,205,206,207,208
2
Metastatic cancer
196,197,198,1990,1991
3
Severe liver disease
5722,5723,5724,5728
6
HIV
042,043,044
6
the Charlson Index. Once found, an indicator function is defined for each of the 17 Charlson categories,
with a code of zero if the category is absent for the patient; otherwise a code of one is assigned. Then
the Charlson Index is defined by a combination sum of weights times the indicator function value. If the
Charlson Index is zero, then the patient has none of the codes for the Charlson Index; the largest sum
defined in this dataset is a value of 13.
data
nis.charlson;
set nis.nis_2005_core;
DX11=substr(DX1,
1
,
3
);
DX12=substr(DX2,
1
,
3
);
DX13=substr(DX3,
1
,
3
);
DX14=substr(DX4,
1
,
3
);
DX15=substr(DX5,
1
,
3
);
DX16=substr(DX6,
1
,
3
);
DX17=substr(DX7,
1
,
3
);
DX18=substr(DX8,
1
,
3
);
DX19=substr(DX9,
1
,
3
);
DX110=substr(DX10,
1
,
3
);
DX111=substr(DX11,
1
,
3
);
DX112=substr(DX12,
1
,
3
);
Search WWH ::
Custom Search