Table 1.

Distribution of demographic and injury characteristics among 80 study subjects, 62 subjects without ε4 allele, and 18 subjects with ε4 allele

CharacteristicsStudy population, n = 80All eligible subjects, n = 315, %APOE ε4-negative, n = 62, %APOE ε4-positive, n = 18, %
n%
Sex
    M4860.064.256.572.2
    F3240.035.843.527.8
Age, y
    <302531.235.633.922.2
    30–492835.034.032.250.0
    ≥502733.830.433.927.8
Race/ethnicity
    White6581.280.683.3
    Other1518.819.416.7
Highest educational level completed
    <High school1518.821.011.1
    High school2430.029.033.3
    Some college2328.733.811.1
    College810.08.116.7
    Graduate school1012.58.127.8
Preinjury employment status
    Employed, full-time5259.871.038.9
    Employed, part-time89.28.116.7
    Retired1213.812.922.2
    Not employed78.06.416.7
    Student, full-time11.11.65.5
Glasgow Coma Scale
    153240.036.841.933.3
    13–144050.044.350.050.0
    9–1288.018.98.116.7
CT scan results
    Negative3645.052.748.433.3
    Positive4455.047.351.666.7
Mechanism of injury
    Motor vehicle accident4758.854.559.755.6
    Fall1822.522.722.622.2
    Assault33.75.83.25.6
    Other1215.017.014.516.6
Loss of consciousness
    No/unknown1620.022.317.727.8
    Yes6480.077.782.372.2