Sidak 's adjustment showed no significant difference in effect size ( the difference in average response in millimeters ) between the active and passive self-ligating brackets ( the results are presented as effect size , @ % confidence intervals , probabilities , and intraclass correlation coefficients ) ( -@ -LSB- -@ , @ -RSB- , @ , @ ) , but the conventional bracket was significantly different from both of these ( -@ -LSB- -@ , -@ -RSB- , @ , @ ; and -@ -LSB- -@ , -@ -RSB- , @ , @ ) .