Table 1. Descriptive characteristics of included studies.
| Authors/Reference | Year | Study type | Sample (n) | Inpatient (n) | Outpatient (n) |
|---|---|---|---|---|---|
| Almeida et al. (12) | 2010 | Retrospective review of prospective data | 100 | 50 | 50 |
| Seybt and Terris (5) | 2010 | Retrospective review of prospective data | 418 | 210 | 208 |
| Snyder et al. (6) | 2010 | Retrospective review of prospective data | 1,242 | 178 | 1,064 |
| Mazeh et al. (13) | 2012 | Retrospective review of prospective data | 608 | 310 | 298 |
| Chin et al. (3) | 2007 | Retrospective case control | 114 | 64 | 50 |
| Tuggle et al. (14) | 2011 | Retrospective | 6,762 | 5,594 | 1168 |
| Lo Gerfo et al. (15) | 1991 | Retrospective | 134 | 58 | 76 |
| Mowschenson and Hodin (16) | 1995 | Retrospective | 100 | 39 | 61 |
| Inabnet et al. (17) | 2008 | Retrospective | 224 | 44 | 180 |
| Teoh et al. (18) | 2008 | Retrospective | 50 | 1 | 49 |
| Champault et al. (19) | 2009 | Retrospective | 95 | 13 | 82 |
| Trottier et al. (8) | 2009 | Retrospective | 232 | 1 | 231 |
| Sklar et al. (20) | 2011 | Retrospective | 247 | 153 | 94 |
| Sahmkow et al. (21) | 2012 | Prospective | 200 | 24 | 176 |