TABLE 4:
Comparison of patient demographics, ASIA neurologic impairment score, and neurologic level of injury for patients included and excluded from analysis
| Included | Excluded | Total | |
|---|---|---|---|
| Number | 635 | 648 | 1280* |
| Average age (y) | 49 | 53 | 102 |
| Male | 452 | 408 | 860 |
| Female | 183 | 240 | 423 |
| ASIA impairment grade | |||
| A | 115 | 92 | 207 |
| B | 42 | 29 | 71 |
| C | 83 | 57 | 140 |
| D | 94 | 49 | 143 |
| E | 298 | 417 | 715 |
| Level of injury | |||
| C1 | 0 | 6 | 6 |
| C2 | 11 | 18 | 29 |
| C3 | 16 | 19 | 35 |
| C4 | 141 | 81 | 222 |
| C5 | 104 | 61 | 165 |
| C6 | 50 | 21 | 71 |
| C7 | 11 | 17 | 28 |
| C8 | 3 | 6 | 9 |
Note.—ASIA indicates American Spinal Injury Association. Populations differed statistically with respect to sexual distribution (P < .01) and neurologic level (P < .001), but not for age (P < 1) or neurologic deficit (ASIA impairment grades A–D, P <.939).
*
Three patients were excluded because of unavailable clinical data.