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. 2011 Sep 9;20(24):4786–4796. doi: 10.1093/hmg/ddr416

Table 1.

Demographic details for the discordant MZ twin-pair samples utilized in this study

SZ-discordant twin pairs BD-discordant twin pairs Psychosis (SZ and BD)-discordant twin pairs
Sex (males:females) 8:3 2:9 10:12
Ethnicity 10 Caucasian, 1 unknown 10 Caucasian, 1 Afro-Caribbean 20 Caucasian, 1 unknown, 1 Afro-Caribbean
Time discordant (years) 10.4 ± 10.6 14.6 ± 10.7 12.6 ± 10.6
Age of onset (years) 20.0 ± 4.6 21.7 ± 12.3 20.9 ± 9.3

Values shown are mean ± standard deviation.