Table 2.
Study design characteristics for studies for readmissions for THA.
| Study | Research Study Design | Data Source | Year(s) of Data | Procedures Per Derivation Cohort | Procedures Per Validation Cohort | Statistical Model | Country/Risk Score Creation |
|---|---|---|---|---|---|---|---|
| (Higuera, Elsharkawy et al., 2011)-a (THA subgroup) | Prospective | Single center EHR system | 2008 | 198 THA | NR | HMLR | USA/No |
| (Khan, Hossain et al., 2012) | Retrospective | Single center EHR system | 2009–2010 | 467 THA | NR | MLR | UK/No |
| (Clement, Derman et al., 2013) | Retrospective | Single center EHR system | 2009–2011 | 1583 THA | NR | MLR | USA/No |
| (Pugely, Callaghan et al., 2013)-a (THA subgroup) | Retrospective | ACS NSQIP | 2011 | 8105 THA | NR | MLR | USA/No |
| (Mednick, Alvi et al., 2014) | Retrospective | ACS NSQIP | 2011 | 9441 THA | NR | MLR | USA/No |
| (Schairer, Sing et al., 2014) | Retrospective | Single center EHR system | 2005–2011 | 1415 THA | NR | CPHR | USA/No |
| (Basques, Bohl et al., 2015) | Retrospective | ACS NSQIP | 2011–2012 | 8434 THA | NR | MLR | USA/No |
| (Heyes, Tucker et al., 2015) | Retrospective | Single center EHR system | 2010–2012 | 424 THA | NR | MLR | UK/No |
| (Stavrakis, SooHoo et al., 2015) | Retrospective | OSHPD | 1995–2010 | 202986 THA | NR | MLR | USA/No |
| (Martin, Gao et al., 2016) | Retrospective | ACS NSQIP | 2012–2013 | 15163 THA | NR | MLR | USA/No |
| (Siracuse and Chamberlain 2016) | Retrospective | HCUP for 4 states | 2006–2011 | 268518 THA | 153560 THA | MLR | USA/Yes |
| (Weiss, Garellick et al., 2016) | Retrospective | Swedish hip arthroplasty register | 1992–2012 | 6690 THA | NR | CPHR | Sweden/No |
| (Ali, Loeffler et al., 2017) | Retrospective | NHS ES | 2006–2016 | 514455 THA | NR | MLR | UK/No |
| (Shah, Keswani et al., 2017) | Retrospective | ACS NSQIP | 2011–2014 | 3120 THA | NR | MLR | USA/No |
| (Sofu, Üçpunar et al., 2017) | Retrospective | Single center EHR system | 2010–2014 | 517 THA | NR | MLR | Turkey/No |
| (Cantrell, DeBell et al., 2018) | Retrospective | ACS NSQIP | 2005–2015 | 10032 THA | NR | MLR | US/No |
| (Kimball, Nichols et al., 2018)-a (THA subgroup) | Retrospective | CMS files | 2014–2015 | 26837 THA | NR | CPHR | US/No |
| (White, Sastow et al., 2018)-a (30-day readmissions) | Retrospective | SID (California, Florida, and New York) & HCUP | 2007–2011 | 274851 THA | NR | MLR | USA/No |
| (White, Sastow et al., 2018)-b (90-day readmissions) | Retrospective | SID (California, Florida, and New York) & HCUP | 2007–2011 | 274851 | NR | MLR | USA/No |
| (Zmistowski, Restrepo et al., 2013) | Retrospective | Single center EHR system | 2004–2008 | 5426 THA | NR | MLR | USA/No |
| (Mesko, Bachmann et al., 2014) | Retrospective | Single center EHR system | 2010–2011 | 1291 THKA combined | 1291 (with bootstrapping of 1000 samples) | MLR | USA/Yes |
| (Tiberi, Hansen et al., 2014) (Only for cirrhosis patients undergoing THKA) | Retrospective – 1:2 matched case control | Single center EHR system | 2000–2012 | 230 THKA combined | NR | MLR | USA/Yes |
| (Ricciardi, Oi et al., 2017) | Retrospective – 1:2 matched case control | Single center EHR system | 2010–2014 | 21864 THKA combined | NR | MLR | USA/No |
| (Sher, Keswani et al., 2017) | Retrospective | ACS NSQIP | 2011–2014 | 7474 THKA combined | NR | MLR | USA/No |
| (Yao, Keswani et al., 2017)-a (THA subgroup) | Retrospective | ACS NSQIP | 2011–2014 | 50376 THA | NR | MLR | USA/No |
| (Schroer, Diesfield et al., 2018) | Retrospective | Multi center (5) EHR system | 2014–2015 | 6968 THKA combined | NR | DS | USA/No |
| (Swenson, Bastian et al., 2018)-a (30-day readmissions) | Retrospective | Single center EHR system | 2013–2015 | 622 THKA combined | NR | MLR | USA/No |
| (Swenson, Bastian et al., 2018)-b (90-day readmissions) | Retrospective | Single center EHR system | 2013–2015 | 622 THKA combined | NR | MLR | USA/No |
ACS NSQIP: American College of Surgeons National Surgical Quality Improvement Program; CMS: Center for Medicare and Medicaid Services; CPHR: Cox Proportional Hazards Regression; DS: Descriptive Statistics; EHR: Electronic Health Record; HCUP: Healthcare Cost and Utilization Project of the Agency for Healthcare Research and Quality; HMLR: Hierarchical Logistic Regression Model using Generalized Estimating Equations; MLR: Multivariate Logistic Regression; NHS ES: National Health Service Hospital Episode Statistics database; NR: Not Reported; OSHPD: California Office of Statewide Health Planning and Development; SID: State Inpatient Database; THA: Total Hip Arthroplasty; THKA: Total Hip or Knee Arthroplasty.