Comparison of alternative risk adjustment measures for predictive modeling: high risk patient case finding using Taiwan's National Health Insurance claims

Table 1 Characteristics of the Taiwanese population for prospective analyses

Inclusion Criteria	2002 & 2003 24 month enrollment
Number of observations	164,562
Male	49.35%
The Insured*	40.93%
Mean age in 2002	34.98
Age Group in 2002
0 ~ 17	23.84%
18 ~ 34	26.83%
35 ~ 49	25.51%
50 ~ 64	14.19%
≥65	9.62%
BNHI Branch
Taipei	32.52%
Northern	14.81%
Central	19.94%
Southern	14.42%
Kao-Pin	16.03%
Eastern	2.27%
Residence Level
Special Municipality	21.31%
City	15.13%
County	63.56%
Medical Utilization
≥1 outpatient visit	89.71%
≥1 inpatient time	7.17%
≥1 pharmacy expenditures	87.77%
≥1 total expenditures	90.05%
Total expenditures (NTD/yr)	14,741
Medical expenditures (NTD/yr)	10,214
Pharmacy expenditures (NTD/yr)	4,108

*: There are two types of beneficiaries: the insured and the dependent. The dependent obtained its health insurance coverage through the insured.

ISSN: 1472-6963