Table 3.
Unadjusted and adjusted associations between usage of health information exchange system at the time of the emergency department visit and admission to the hospital.
| Sample size | System access % |
OR & 95%CI1 | |
|---|---|---|---|
| Matching criterion changes | |||
| Usage limited to same calendar day as ED encounter | 15645 | 1.2 | 0.83 (0.55, 1.25) |
| Sample definition | |||
| Multiple encounters per patient included in analysis | 24543 | 2.2 | 0.69 (0.53, 0.90) |
| Stratified analyses | |||
| ≥ 65 | 5728 | 2.4 | 0.72 (0.49, 1.06) |
| <65 | 9917 | 2.4 | 0.62 (0.37, 1.02) |
| ≥ 3 major ADGs | 2819 | 1.6 | 0.83 (0.42, 1.63) |
| < 3 major ADGs | 12826 | 2.6 | 0.67 (0.48, 0.94) |
| ≥ 1 prior hospitalizations | 1962 | 1.5 | 1.02 (0.47, 2.26) |
| No prior hospitalizations | 13683 | 2.5 | 0.66 (0.47, 0.92) |
| Excluded encounters with injury or pregnancy complication diagnoses | 12409 | 2.5 | 0.70 (0.51, 0.95) |
| Limited to only providers that used HIE | 8670 | 4.5 | 0.46 (0.34, 0.62) |