Table 3.
Odds ratios from the adjusted multilevel logistic regression model estimating the association between discharge mobility scores and potentially preventable 30-day readmissions following inpatient rehabilitation
| Odds Ratio (95% CI)* | |
|---|---|
| Age, years | |
| <75 | Ref |
| 75–84 | 1.21 (1.17, 1.26) |
| >84 | 1.41 (1.35, 1.47) |
| Sex | |
| Female | Ref |
| Male | 1.04 (1.01, 1.08) |
| Race/ethnicity† | |
| Non-Hispanic white | Ref |
| Non-Hispanic black | 0.94 (0.88, 0.99) |
| Hispanic | 0.89 (0.83, 0.96) |
| Other | 0.71 (0.64, 0.80) |
| Disability entitlement‡ | |
| No | Ref |
| Yes | 1.16 (1.11, 1.21) |
| Dual eligibility§ | |
| No | Ref |
| Yes | 1.18 (1.13, 1.23) |
| Prior hospitalizations | |
| 0 | Ref |
| 1 | 1.41 (1.36, 1.46) |
| 2 | 1.79 (1.70, 1.89) |
| 3+ | 2.51 (2.36, 2.66) |
| CCS Diagnostic category|| | |
| Diseases of the Musculoskeletal System and | Ref |
| Connective Tissue | |
| Diseases of the Circulatory System | 1.51 (1.39, 1.64) |
| Injury and Poisoning | 1.03 (0.95, 1.11) |
| Diseases of the Respiratory System | 2.15 (1.96, 2.34) |
| Infectious and Parasitic Diseases | 1.88 (1.71, 2.06) |
| Diseases of the Genitourinary System | 1.88 (1.70, 2.07) |
| Diseases of the Digestive System | 1.29 (1.16, 1.43) |
| Neoplasms | 1.36 (1.22, 1.52) |
| Endocrine, Nutritional, and Metabolic Diseases and Immunity Disorders | 1.35 (1.20, 1.53) |
| Diseases of Nervous System and Sense Organs | 1.10 (0.98, 1.24) |
| Diseases of the Skin and Subcutaneous Tissue | 2.19 (1.88, 2.56) |
| Disease of Blood and Blood-Forming Organs | 1.52 (1.22, 1.89) |
| Mental Disorders | 0.99 (0.73, 1.35) |
| Congenital Anomalies | 0.90 (0.57, 1.43) |
| Other | 1.08 (0.93, 1.25) |
| Hospital LOS | |
| <4 days | Ref |
| 4 to 7 days | 1.13 (1.08, 1.18) |
| >7 days | 1.36 (1.30, 1.43) |
| ICU/CCU | |
| No | Ref |
| Yes | 1.03 (1.00, 1.07) |
| Elixhauser Comorbidity Sum | |
| 0–1 | Ref |
| 2–4 | 1.65 (1.52, 1,79) |
| 5+ | 2.57 (2.36, 2.79) |
| IR Impairment group | |
| LE Fracture | Ref |
| Stroke | 0.80 (0.73, 0.87) |
| LE Joint Replacement | 0.75 (0.67, 0.84) |
| Neurologic Disorders | 1.39 (1.29, 1.51) |
| Debility | 1.32 (1.22, 1.43) |
| Brain Injury | 1.12 (1.03, 1.21) |
| Other Ortho Conditions | 1.10 (1.01, 1.20) |
| Cardiac Conditions | 1.66 (1.52, 1.81) |
| Spinal Cord Injury | 1.15 (1.03, 1.29) |
| Other | 1.24 (1.15, 1.34) |
| IR Program Interruption | |
| No | Ref |
| Yes | 1.24 (1.04, 1.49) |
| Bowel/Bladder Management | |
| <9 | Ref |
| 9–12 | 0.80 (0.77, 0.83) |
| >12 | 0.73 (0.69, 0.76) |
| Mobility¶ | |
| <18 | Ref |
| 18–26 | 0.79 (0.76, 0.82) |
| >26 | 0.64 (0.61, 0.68) |
| Cognition¶ | |
| <25 | Ref |
| 25–32 | 0.96 (0.93, 1.00) |
| >32 | 0.84 (0.80, 0.89) |
Abbreviations: CCS, Clinical Classification Software; LOS, length of stay; IR, inpatient rehabilitation; LE, lower extremity; Ortho, orthopedic
ORs from a multilevel model adjusted for all patient-level characteristics in the table.
Race/ethnicity missing for 968 cases in the overall sample and 41 cases with potentially preventable post-discharge readmissions. “Other” includes the categories Asian/Pacific Islander, American Indian/Alaskan Native, and Other.
“Disability” original reason for receiving Medicare.
Eligible for Medicare and Medicaid.
Agency for Healthcare Research and Quality. Healthcare Cost and Utilization Project (HCUP). Clinical Classifications Software (CCS) 2015. Available at: http://www.hcup-us.ahrq.gov/toolssoftware/ccs/CCSUsersGuide.pdf. Accessed 5/16/2016.
Functional score at discharge from inpatient rehabilitation. Domains generated from items in the Functional Independence Measure. Mobility: 5 items related to transfers, walking/wheelchair mobility, and ability to climb stairs (score range 5–35); Cognition: 5 items related to comprehension, expression, social interaction, problem solving, and memory (score range 5–35). Domain scores categorized as lowest quartile, interquartile range, and highest quartile.