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TABLE 4: 
Comparison of patient demographics, ASIA neurologic impairment score, and neurologic level of injury for patients included and excluded from analysis
IncludedExcludedTotal
Number6356481280*
Average age (y)4953102
    Male452408860
    Female183240423
ASIA impairment grade
    A11592207
    B422971
    C8357140
    D9449143
    E298417715
Level of injury
    C1066
    C2111829
    C3161935
    C414181222
    C510461165
    C6502171
    C7111728
    C8369
  • 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.