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Table 1 Affected sib pairs compared to other groups: Univariate model

From: Morphological features in a Xhosa schizophrenia population

Variable % Abnormal Chi-square P
Group* 1 2 3 4   
N 46 17 37 44   
Epicantus 10.9 23.5 24.3 31.0 5.65 0.130
Low set ears 35.6 29.4 30.6 17.9 2.85 0.415
Adherent earlobes 26.2 31.3 33.3 65.1 13.94 0.003
sSibs vs grp 2      0.37 0.543
sSibs vs grp 3      0.86 0.353
sSibs vs grp 4      12.59 0.0004
Malformed ears 9.1 0.0 8.1 2.3 - -
Palatal abnormalities 48.6 41.7 36.0 96.3 19.13 0.0003
sSibs vs grp 2      0.10 0.750
sSibs vs grp 3      0.69 0.407
sSibs vs grp 4      15.29 0.0001
Tongue abnormalities 10.3 11.1 17.9 19.5 1.71 0.635
5 th finger variations 17.8 25.0 21.6 18.6 0.35 0.950
Transverse palmar crease 2.2 0.0 2.8 7.0 - -
Third toe abnormalities 0.0 0.0 0.0 0.0 - -
Syndactalia 19.6 6.3 25.0 18.6 3.86 0.277
Asymmetrical ears 9.1 17.7 32.4 2.3 12.68 0.005
sSibs vs grp 2      0.64 0.422
sSibs vs grp 3      6.51 0.011
sSibs vs grp 4      2.25 0.133
Gap between toes 31.1 20.0 5.6 7.0 7.43 0.059
sSibs vs grp 2      0.55 0.460
sSibs vs grp 3      6.16 0.013
sSibs vs grp 4      5.52 0.019
  1. *Group 1 sib pairs with schizophrenia (sSibs)
  2. Group 2 probands with an affected non-participating sib
  3. Group 3 singleton controls, unaffected
  4. Group 4 sib pairs, unaffected