Characteristics of the overall population and by self-identified race/ethnicity.

<p>^<i>a</i><i>Mean sample size for 15 datasets; total counts may not always add up as numbers were not the same for all 15 data sets (the number deleted was based on imputed values for each data set); the percentages may not add up to 100% due to rounding;</i></p><p>^<i>b</i><i>means and percentages are weighted;</i></p><p>^<i>c</i><i>data not available for 533 participants;</i></p><p>^<i>d</i><i>between BACH I and III</i>,</p><p>^<i>e</i><i>between BACH II and III; CI = confidence interval; p25 = lower quartile; p75 = upper quartile</i>.</p><p>Characteristics of the overall population and by self-identified race/ethnicity.