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Return to:   Effects of Recreational Physical Activity and Back Exercises
on Low Back Pain and Psychological Distress

Frequency Distributions of Selected Sociodemographic Characteristics: UCLA Low Back Pain Study, 1995–2000

VariableSample (n = 681), %
Age, y
    < 309.4
    ≥ 7018.2
    Asian/Pacific Islander4.5
    African American/Black2.8
Education level
    High school or less29.6
    Some college39.5
Marital status
    Married/involved in relationship71.6
    Never married10.1
Employment status
    Employed full time58.7
    Employed part time8.1
    On leave/unemployed7.5
General health status
    Very good37.0
Weekly metabolic equivalent task score,b%
    ≥ 2625.0
aThe mean age was 51.0 years (SD = 16.7); the median was 50 years.

bThe metabolic equivalent task score measures metabolic energy cost expressed as a multiple of the resting metabolic rate (the higher the score, the greater the energy expenditure from physical activity).