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. Author manuscript; available in PMC: 2013 May 20.
Published in final edited form as: Psychol Med. 2011 Jul 7;42(1):111–123. doi: 10.1017/S0033291711001127

Table 2.

Descriptive statistics of patients with schizophrenia, their relatives, and offspring in each comparison group.

Relationship
Comparison groups a. Paternal
half-cousin		 b. Maternal
half-cousin		 c. Full cousin d. Paternal
half-sibling		 e. Maternal
half-sibling
Offspring exposure status Yes No Yes No Yes No Yes No Yes No
Number of offspring 352 629 265 407 2923 6179 427 505 488 597
Mean offspring grades −0.47 −0.19 −0.55 −0.36 −0.23 −0.05 −0.38 −0.45 −0.42 −0.42
- Confidence intervals) −.57, −.37
|		 −0.27
|
−0.11		 −0.66
|
−0.45		 −0.45
|
−0.27		 −0.26
|
−0.19		 −0.07
|
−0.02		 −0.47
|
−0.29		 −0.53
|
−0.36		 −0.50
|
−0.34		 −0.51
|
−0.34
Mean education level of schizophrenic parents (CI) 2.83
2.69
|
2.97		 - 2.65
2.52
|
2.79		 - 3.13
3.08
|
3.18		 - 2.80
2.67
|
2.92		 - 2.83
2.69
|
2.97		 -
Mean education level of non-schizophrenic parents (CI) 3.22
3.07
|
3.38		 3.32
3.22
|
3.42		 3.26
3.07
|
3.45		 3.18
3.08
|
3.29		 3.28
3.22
|
3.33		 3.52
3.49
|
3.56		 3.35
3.21
|
3.49		 3.38
3.28
|
3.49		 3.34
3.20
|
3.46		 3.29
3.19
|
3.38