Exhibit 1. Descriptive Statistics for Matching Variables for Hospital-Acquired Conditions and Matched Control Index Hospitalizations.
| Multivariable matching variables | Severe pressure ulcers | Falls and trauma: fracture | Catheter-associated urinary tract infection | Vascular catheter-associated infection | SSI following certain orthopedic procedures | DVT/PE following certain orthopedic procedures |
|---|---|---|---|---|---|---|
| Number of Episodes with this HAC | 1,939 | 7,223 | 5,161 | 5,501 | 311 | 4,364 |
| Number matched comparison cases | 9,834 | 35,184 | 24,984 | 25,743 | 1,539 | 22,443 |
| Matching variables: | ||||||
| Gender | ||||||
| % Female | 54 | 66 | 66 | 55 | 58 | 67 |
| Race | 74 | 91 | 83 | 74 | 86 | 90 |
| % White | ||||||
| Age Distribution | ||||||
| % under 65 | 16 | 10 | 10 | 31 | 30 | 6 |
| % 65–69 | 14 | 13 | 10 | 19 | 20 | 20 |
| % 70–74 | 11 | 13 | 13 | 13 | 26 | 23 |
| % 75–79 | 14 | 17 | 16 | 14 | 13 | 21 |
| % 80–84 | 17 | 18 | 19 | 12 | 8 | 16 |
| % 85–89 | 16 | 18 | 19 | 7 | 3 | 10 |
| % > 90 | 11 | 11 | 13 | 3 | 0 | 4 |
| Surgical procedure code | None | None | None |
38.93 38.95 |
81.01–81.08 81.23–81.24 81.31–81.38 81.83 81.85 |
00.85–00.87 81.51–81.52 81.54 |
| Three most common MS-DRGs in the HAC and comparison groups, (n for the HAC group) | 871: Septicemia w MCC (112) | 470: Major joint replacement w/o MCC (1,038) | 291: Heart failure and shock w MCC (223) | 329: Major bowel procedures w MCC (342) | 460: Spinal fusion w/o MCC (116) | 470: Major joint replacement w/o MCC (3,188) |
| 003: ECMO or tracheotomy with major OR (92) | 981: Unrelated OR procedure w MCC (639) | 470: Major joint replacement w/o MCC (186) | 871: Septicemia w MCC (223) | 459: Spinal fusion w MCC (68) | 469: Major joint replacement w MCC (924) | |
| 04: Tracheotomy without major OR (51) | 982: Unrelated OR procedure w CC (566) | 064: Intracranial hemorrhage w MCC (126) | 682: Renal failure w MCC (160) | 453: Anterior/ posterior spinal fusion w MCC (27) | 462: Bilateral or major joint procedures w/o MCC (157) |
NOTES: HAC, hospital-acquired condition; SSI, surgical site infection; DVT/PE, deep vein thrombosis or pulmonary embolism; MS-DRG, Medicare severity diagnosis related groups; MCC, major complications/comorbid conditions; ECMO, extracorporal membrane oxygenation; OR, operating room; CC, complications/cormorbid conditions.
SOURCE: Authors’ analysis of FY 2009 and FY 2010 Medicare Part A and Part B episodes of care data.