Means and standard deviations in the seven TCI dimensions in the CATSS-15, DOGSS, Brändström [3] and Garcia [29] study groups.

Note: ▾Common items from the 125-item and 238-item TCI versions; ♀ higher than boys in the same sample (P<.05); ♂ higher than girls in the same sample (P<.05); B higher than adolescents in Brändström study group (P<.05); C higher than adolescents in the CATSS-15 (P<.05); D higher than adolescents in the DOGSS (P<.05); G higher than adolescents in the Garcia study group (P<.05); T higher than the whole twin group (CATSS-15 & DOGSS) (P<.05).