Table 1

Characteristics of patients and disease two years before and after EMR adoption, based on 425 EMR-adopting hospitals
Variable EMR hospital Non EMR hospital P-value
Mean (SD) Mean (SD)
Number of Sample 360,105 313,088
Male 41.49% 41.00% < 0.01
Race White 86.60% 87.23% < 0.01
Black 9.47% 8.59% < 0.01
Other 3.93% 4.18% < 0.01
Age 78.35 (7.67) 78.63(7.75) < 0.01
DRG weight 1.58 (1.33) 1.53 (1.31) < 0.01
Comorbidity 2.84 (1.74) 3.42 (2.59) < 0.01

EMR, electronic medical records; SD, standard deviation; DRG, diagnosis related group.

Comorbidity: Elixhauser comorbidity were generated for the 12 months before admission using inpatient and physician claims from MEDPAR, Outpatient Statistical Analysis Files, and Carrier files.

Included only patients not enrolled in HMO and with both Medicare Parts A and B for the entire 12 months before admission. Excluded discharged to other acute care hospitals.

Lee et al.

Lee et al. BMC Health Services Research 2013 13:39   doi:10.1186/1472-6963-13-39

Open Data