Table 4.
Eligibility criteria for readmission prediction models*
| Criterion | Studies (n, %) | Citations (see online supplemental appendix E) |
| Inclusion criteria | ||
| Age | 48 (59%) | |
| >18 years (adults only) | 25 (31%) | 37 40 43 45 47 49–51 55 56 65 67 68 73 74 78 80–82 85 86 88 92 93 95 |
| >65 years (elderly only) | 19 (23%) | 17–19 21 25 27 28 32–34 38 48 52 60 66 76 77 79 90 |
| Other | 5 (6%) | 23 36 42 62 93 |
| Condition specific | 45 (56%) | |
| Heart failure | 16 (20%) | 18 21 26 29 33 46 47 67–69 71–75 86 |
| AMI or other cardiovascular | 11 (14%) | 3 46–58 64–66 70 |
| Pneumonia or other pulmonary | 6 (7%) | 19 46 47 62 76 77 |
| Multiple | 6 (7%) | 23 24 28 31 54 63 |
| Other | 11 (14%) | 80 84–93 |
| Service specific | 24 (30%) | |
| Medicine | 14 (17%) | 35 36 38 40 44 45 78–83 87 |
| Surgery | 7 (9%) | 57 60 63 89–92 |
| Other | 3 (4%) | 52 94 95 |
| Beneficiaries | 22 (27%) | |
| Medicare | 15 (19%) | 15 17–19 21 25 28 32 33 41 48 58 60 66 90 |
| Veterans | 7 (9%) | 22 36 38 39 53 58 61 |
| Exclusion criteria | ||
| Disposition | 28 (35%) | |
| Left against medical advice | 11 (14%) | 21 40 42 45 46 50 58 60 61 80 82 |
| Skilled nursing or other care facility | 10 (12%) | 32 37 43 50 56 61 68 78 86 93 |
| Hospice care | 8 (10%) | 32 43 49 61 78 85 86 88 |
| Different healthcare system | 4 (5%) | 35 36 44 94 |
| Transfers | 26 (32%) | |
| Transfer-out (to other institution or service) | 24 (30%) | 17–22 27 33 40 42 45 46 56 58 61–63 68 72 74 76 77 80 93 |
| Transfer-in (from other institution or service) | 3 (4%) | 47 53 61 |
| Service or condition | 24 (30%) | |
| Rehabilitation | 10 (12%) | 21 43 49–51 56 58 61–63 68 72 74 76 77 80 93 |
| Psychiatric | 8 (10%) | 22 27 43 50 51 55 56 61 |
| Obstetric/neonatal | 8 (10%) | 20 23 42 43 47 51 55 56 61 |
| Transplant | 4 (5%) | 75 84–86 |
| Other (ESRD, trauma, etc) | 5 (6%) | 15 34 36 42 86 |
| Length of stay | 22 (27%) | |
| <24 hours (same-day discharge or procedure) | 16 (20%) | 17 21 23 27 45–47 51 56 61 66 78 80 92 94 |
| >30 days | 5 (6%) | 40 57 63 90 91 |
| Hospitalisation type | 9 (11%) | |
| Planned (aka elective) | 3 (4%) | 34 93 |
| Non-acute (aka non-emergent) | 3 (4%) | 24 42 79 |
| Observation only | 2 (2%) | 43 51 |
| Study related | 7 (9%) | |
| Unavailable for follow-up (no telephone, etc) | 5 (6%) | 36 37 40 70 89 |
| Cannot consent (poor cognition) | 2 (2%) | 37 67 |
| Non-English speaking | 2 (2%) | 67 73 |
| Non-residents (outside the primary service area) | 7 (9%) | 20 33 36 46 65 67 93 |
| No insurance coverage (for part or all of the data extraction period) | 5 (6%) | 42 56 60 66 77 |
| Data-related (not recent or validated) | 3 (4%) | 32 33 52 |
| Readmitted for different condition | 3 (4%) | 17–19 |
An extended version of this table is available in online supplemental appendix D.
*This table does not cover exclusions based on mortality (see recommendation #3) or missingness (see recommendation #8).
AMI, acute myocardial infarction; ESRD, end-stage renal disease.