Subgroup comparisons in demographics and clinical variables.

<p>IQ, Intelligence quotient; SD, standard deviation; TDC1, 10 TDC subjects with the lowest values of the filter function; TDC2, 10 TDC subjects with the highest value of the filter function; VFF, value of the filter function.</p><p>†chi2 test were performed.</p><p>Subgroup comparisons in demographics and clinical variables.