Table 1.
Study Characteristics and Demographics.
| Author | Year | Alarm threshold current | Total patients | Total screws | Screws with responses below EMG alarm threshold | Screws repositioned | % male | Mean age |
|---|---|---|---|---|---|---|---|---|
| Alemo 17 | 2010 | 8 mA | 86 | 414 | 28 | 21 | 40.7% | 49 |
| Bindal 18 | 2007 | 7 mA | 25 | 105 | 0 | 0 | 40.0% | 46 |
| Bose 10 | 2002 | 7 mA | 61 | – | – | – | . | 48.4 |
| Clements 19 | 1996 | 11 mA | 25 | 112 | 15 | – | 44.0% | – |
| Darden 20 | 1996 | Determined individually for each pedicle | 132 | 630 | 42 | 21 | 41.70% | 48.7 |
| Feng 21 | 2012 | 10 mA | 16 | 64 | 3 | 3 | 43.80% | – |
| Maguire 22 | 1995 | 6 mA | 29 | 144 | 13 | 10 | 55.2% | 46.5 |
| Papadopoulos 23 | 2005 | 7 mA | 45 | 57 | 0 | 0 | 44.4% | 57.2 |
| Sutter 24 | 2007 | 8 mA | 409 | – | – | – | 39.6% | 62.5 |
| Welch 13 | 1997 | Determined individually for each pedicle | 32 | 164 | 4 | 4 | 53.1% | 46.7 |
| Wood 25 | 2010 | 5 mA | 47 | 212 | 20 | 9 | 38.3% | 51.3 |
| Wood 5 | 2014 | 5 mA | 150 | 627 | 19 | 19 | 44.7% | 58 |
| Melachuri (Retrospective cohort study from authors—accepted for publication) | 2020 | 8 mA | 1179 | 8584 | 187 | – | 44.6 | 55 |
Footnote: EMG, electromyography.