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Table 1 Characteristics of patients and disease two years before and after EMR adoption, based on 425 EMR-adopting hospitals

From: The effect of electronic medical record adoption on outcomes in US 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
  1. EMR, electronic medical records; SD, standard deviation; DRG, diagnosis related group.
  2. 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.
  3. 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.