Table 4 Swimming ability by significant demographic variables
VariablenMeanSD
Age group
    4–11 years7092.41.2
    12–17 years7563.01.3
Sex
    Male7642.71.3
    Female7492.61.3
Lunch programme
    Free lunch6812.61.3
    Reduced lunch1982.61.3
    No lunch programme4912.81.2
Parent’s education
    Some high school2832.71.3
    High school diploma/GED2702.31.2
    College/technical school degree3992.41.2
    Advanced degree (Masters/PhD)2443.01.3
Race
    African–American7842.51.3
    Hispanic/Latino3472.61.3
    White2233.11.2
    Multiracial1082.81.3
    Asian503.11.3
    Other472.81.2
  • Swimming ability was measured as: 1 = unable to swim; 2 = can swim a little, but not comfortable in deep water; 3 = comfortable in deep water, but cannot swim for very long; 4 = can swim for an extended period of time; 5 = can swim competitively (or could) and for an extended period of time.