TABLE 2.

Demographic Variables

CG StudyPopulation Study (NLSCY or NPHS)Comparison
Age (y)*
    Mean (SD)40.3 (6.7)39.9 (5.4)*; 40.2 (6.3)t = 1.41, NS*; t = 0.3, NS
    Range23–6318–64*; 18–75
Gender, % female*94.493.0*; 53.5χ2(1) = 1.51, NS*; χ2(1) = 295.3, P < .001
Education,* %
    Less than high school13.5 (1.6)11.2 (0.6)
    Finished high school19.7 (1.8)16.4 (0.8)
    Some postsecondary19.0 (1.8)28.1 (0.9)
    Diploma30.7 (2.1)28.6 (0.9)
    Degree17.3 (1.8)15.7 (0.7)χ2(4) = 15.9, P < .001
Household income,* %
    $0–29 99925.0 (2.0)16.1 (0.5)
    $30 000–59 99934.1 (2.2)32.5 (1.0)
    $60 000 or more40.9 (2.3)51.4 (1.0)χ2(2) = 25.75, P < .001
Work for pay,* %66.0 (2.2)81.2 (0.8)χ2(1) = 54.0, P < .001
Full-time work,* %67.5 (2.7)73.2 (1.0)χ2(1) = 4.3, P = .04
Main activity,* %
    Caring for family37.2 (2.2)28.4 (0.9)
    Working for pay1.1 (0.5)5.4 (0.5)
    Caring and working58.5 (2.3)62.7 (1)
    School1.3 (0.5)1.2 (0.2)
    Other1.9 (0.6)χ2(3) = 27.1, P < .001
  • NS indicates not significant.

  • * Data from the NLSCY.

  • Data from the NPHS.