Table 4

Difference between outcomes in hospitals that adopted EMR (n = 425) vs. non-EMR (n = 283) hospitals, before and after the years of EMR adoption by DRG type (surgical or medical) and hospital characteristics (for all DRGs)
DRGs Number of hospitals 30-day rehosp 30-day mortality Inpatient mortality Length of stay
Difference in outcome (Std. Err) Difference in outcome (Std. Err) Difference in outcome (Std. Err) Difference in outcome (Std. Err)
Surgical DRGs −0.05% 0.23% * −0.24% ** −0.11 day
(0.09) (0.08) (0.06) (0.13)
Medical DRGs 0.37% ** −0.22% ** −0.01% 0.07 day**
(0.06) (0.07) (0.05) (0.023)
Hospital characteristics P-value P-value P-value P-value
Number of Bed 1st Quartile (Less than 170) 0.24 % ** 0.71 0.06 % 0.17 0.08% * 0.16 0.04 day 0.42
185 (0.08) (0.08) (0.03) (0.07)
2nd Quartile (170–260) 0.32% ** −0.11 % −0.03 % −0.07 day
188 (0.06) (0.00) (0.05) (0.05)
3rd Quartile (261–390) 0.26 % ** −0.14 ** −0.02% −0.19 day
177 (0.06) (0.04) (0.04) (0.13)
4th Quartile (Over 390) 0.33 % ** 0.02 0.07% - 0.07 day
158 (0.06) (0.08) (0.04) (0.11)
Teaching Status Teaching 0.29 % ** 0.99 −0.05 % 0.65 −0.004 % 0.55 - 0.01 day 0.20
399 (0.05) (0.05) (0.06) (0.08)
Non-Teaching 0.29 % ** −0.02 % 0.03% −0.16 day *
309 (0.07) (0.06) (0.04) (0.09)
Ownership For-profit 0.27 % ** 0.02 −0.02 % 0.02 0.01% 0.95 −0.05 day 0.28
551 (0.06) (0.04) (0.03) (0.05)
Not-for-profit 0.07 % −0.20 % 0.04 % 0.08 day
(0.08) (0.16) (0.11) (0.14)
Public 55 0.42 % ** −0.09 % 0.03 % −0.39 day
102 (0.11) (0.09) (0.06) (0.33)

Difference in outcomes was calculated by subtracting the mean values in the eight quarters before the year of EMR adoption with the values in the eight quarters after the year of EMR adoption.

All outcomes were adjusted by patient (gender, age and race) and disease characteristics (DRG weight and Comorbidities).

** p < 0.01, * p < 0.05.

Lee et al.

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

Open Data