Table 2.
Description of Patient and Facility Characteristics Among US Adult Inpatient Admissions in the Premier Healthcare Database, 2016–2017
| Encounters | n = 11 701 326 |
|---|---|
| No. of admissions by year | |
| 2016 | 5 834 810 |
| 2017 | 5 866 516 |
| Total patient-days | 64 064 632 |
| Patient characteristics | n = 11 701 326 (%) |
| Age, median (IQR) | 62 (42–75) |
| Male | 4 834 283 (41) |
| Race | |
| White | 8 690 211 (75) |
| Black | 1 651 263 (14) |
| Other | 1 135 218 (10) |
| Unknown | 224 634 (2) |
| Payer | |
| Medicare | 5 829 127 (50) |
| Medicaid | 1 976 689 (17) |
| Private | 3 065 584 (26) |
| Other | 829 926 (7) |
| Length of stay in days, median (IQR) | 4 (3–6) |
| Died | 258 668 (2) |
| Top 5 MS-DRGsa | |
| Vaginal delivery w/o complicating diagnosis | 828 478 (7) |
| Septicemia or severe sepsis w/o MV >96 hours w/ MCC | 509 476 (4) |
| Major joint replacement or reattachment of lower extremity w/o MCC | 483 684 (4) |
| Cesarean section w/o CC/MCC | 284 173 (2) |
| Heart failure and shock w/ MCC | 258 083 (2) |
| Top 5 Elixhauser comorbiditiesa,b | |
| Hypertension | 4 830 425 (41) |
| Fluid and electrolyte disorders | 3 500 288 (30) |
| Chronic pulmonary disease | 2 783 243 (24) |
| Deficiency anemias | 2 330 685 (20) |
| Congestive heart failure | 2 055 661 (18) |
| Elixhauser comorbidity score, median (IQR)c | 3 (1–5) |
| Top 5 CCS disease categoriesa,c | |
| Essential hypertension | 4 334 551 (37) |
| Disorders of lipid metabolism | 4 191 814 (26) |
| Fluid and electrolyte disorders | 3 499 631 (30) |
| Other nutritional- endocrine- and metabolic disorders | 3 277 471 (28) |
| Coronary atherosclerosis and other heart disease | 2 796 670 (24) |
| Facility characteristics | n = 576 (%) |
| Urband | 432 (75) |
| Teaching | 170 (30) |
| Bed size | |
| 0–99 | 126 (22) |
| 100–199 | 143 (25) |
| 200–299 | 102 (18) |
| 300–399 | 82 (14) |
| 400–499 | 41 (7) |
| 500+ | 82 (14) |
| US Census Region and Division | |
| Northeast | 76 (13) |
| Mid-Atlantic | 63 (11) |
| New England | 13 (2) |
| South | 260 (45) |
| East South Central | 37 (6) |
| West South Central | 62 (11) |
| South Atlantic | 161 (28) |
| Midwest | 147 (26) |
| West North Central | 46 (8) |
| East North Central | 101 (18) |
| West | 93 (16) |
| Mountain | 25 (4) |
| Pacific | 68 (12) |
Abbreviations: CC, complication or comorbidity; CCS, Clinical Classifications Software (maintained by the Agency for Healthcare Research and Quality [AHRQ]); IQR, interquartile range; MCC, major complication or comorbidity; MS-DRG, Medicare Severity-Diagnosis Related Group; MV, mechanical ventilation; w/ and w/o, with and without.
aEach encounter receives 1, and only 1, MS-DRG assignment. Patients can have multiple Elixhauser comorbidities and CCS diseases per encounter.
bElixhauser comorbidity classifications modified to also include primary diagnoses. Patient Elixhauser scores represent unweighted Elixhauser comorbidity sums (1 point per comorbidity).
c Two most common CCS categories excluded from this listing because they do not represent disease categories: “Residual codes—unclassified” (54%) and “Other aftercare” (38%).
dDesignation provided by Premier, based upon American Hospital Association Annual Survey response.