Table 5.
aAmerican Indian sample data were adjusted for age and gender using direct standardization to the 2000 U.S. population.
bNorth Dakota and U.S. proportions presented are from the weighted data available from the Centers for Disease Control and Prevention.
cData from 2005 North Dakota (n=4,010) and U.S. (n=356,112) samples were substituted because data were not collected in 2004.
dProportions are significantly different from those in the same row (p<0.05) based on Chi-square analysis.
eThe American Indian sample proportion was not significantly different (p>0.05) from either the North Dakota (ND) or U.S. proportions, but ND and U.S. proportions were significantly different (p<0.05).
CI = confidence interval