Table 1. Patient Demographic Characteristics (Sites 1 and 2).
| Characteristic | Patients, No. (%) | Standardized difference, %a | ||||
|---|---|---|---|---|---|---|
| Before the intervention/EHR go-live period | EHR integration/EHR go-live period | Postintervention period | Before EHR integration/EHR go-live period | EHR integration/EHR go-live period | Postintervention period | |
| No. of admissions | 195 528 | 489 597 | 215 510 | NA | NA | NA |
| No. of patient-days | 1 102 437.52 | 2 641 765.57 | 1 211 330.63 | NA | NA | NA |
| Hospital length of stay, mean (SD), d | 5.6 (7.9) | 5.4 (7.3) | 5.6 (7.5) | 3.2 | 0.2 | −3.0 |
| Unit length of stay, mean (SD), d | 4.6 (6.0) | 4.4 (6.1) | 4.4 (5.7) | 3.6 | 3.1 | −0.7 |
| Age, y | ||||||
| <65 | 110 800 (56.7) | 259 723 (53.1) | 110 059 (51.1) | 7.3 | 4.0 | 1.2 |
| ≥65 | 84 728 (43.3) | 229 867 (47.0) | 105 451 (48.9) | −7.3 | −4.0 | −1.2 |
| Raceb | ||||||
| Non-White | 66 528 (35.2) | 140 688 (29.5) | 73 306 (35.3) | 12.2 | −12.4 | −0.2 |
| White | 122 187 (64.8) | 335 723 (70.5) | 134 132 (64.7) | −12.2 | 12.4 | 0.2 |
| Ethnicityc | ||||||
| Hispanic | 31 365 (18.9) | 61 491 (13.8) | 34 714 (17.4) | 13.8 | −9.7 | 4.1 |
| Non-Hispanic | 134 231 (81.1) | 382 795 (86.2) | 165 113 (82.6) | −13.8 | 9.7 | −4.1 |
| Sex | ||||||
| Female | 104 700 (53.6) | 255 946 (52.3) | 113 406 (52.6) | 2.6 | −0.7 | 1.9 |
| Male | 90 816 (46.4) | 233 638 (47.7) | 102 100 (47.4) | −2.6 | 0.7 | −1.9 |
| Primary insurance | ||||||
| Public | 121 053 (62.7) | 293 914 (60.3) | 134 363 (62.5) | 4.9 | −4.6 | 0.4 |
| Private | 72 133 (37.3) | 193 765 (39.7) | 80 650 (37.5) | −4.9 | 4.6 | −0.4 |
| Total Charlson Comorbidity Index score at admission | ||||||
| 0-1 | 92 551 (48.6) | 228 221 (46.6) | 92 662 (43.0) | 3.8 | 7.3 | 11.2 |
| ≥2 | 98 087 (51.4) | 261 175 (53.4) | 122 817 (57.0) | −3.8 | −7.3 | −11.2 |
Abbreviations: EHR, electronic health record; NA, not applicable.
a
Considering standard differences of less than 10% as not significant.
b
Race data are based on self-reported EHR data. Racial and ethnic categories in the non-White group include American Indian or Alaska Native, Asian or Pacific Islander, Black or African American, Native Hawaiian or Other Pacific Islander. Categories in the White group include White or Caucasian.
c
Ten percent of ethnicity data missing across sites.