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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: JAMA Psychiatry. 2014 Sep 1;71(9):1049–1057. doi: 10.1001/jamapsychiatry.2014.994

Table 4.

Cherny results: tests of linear changes in heritability across the distribution

N h2 c2 h2 linear c2 linear
Paranoia 3214 .52 (.35/.69)** .05 (−.04/.19) −.06 (−.14/.02) .00 (−.06/.07)
Hallucinations 3224 .15 (−.05/.36) .27 (.11/.44)** .06 (−.01/.13) −.06 (−.13/.00)
Cognitive disorganisation 3216 .45 (.31/.58)** .05 (−.06/.16) −.07 (−.19/.05) .02 (−.12/.23)
Grandiosity 3218 .49 (.33/.66)** .05 (−.08/.19) −.02 (−.11/.07) .00 (−.07/.07)
Anhedonia 3218 .43 (.29/.56)** .07 (−.03/18) −.05 (−.14/.05) .02 (−.05/.09)
Negative symptoms 3237 .38 (.21/.53)** .49 (.36/.61)** .09 (.04/.14)** −.13 (−.17/-.09)**
*

Note:<.05,

**

p<01.

Significant h2 and c2 indicate significant genetic and shared environmental influences respectively. Significant linear effects suggest that genetic (h2 linear) or shared environmental (c2 linear) influence significantly increase/decrease at the extremes. Quadratic effects were tested but were not significant, results available from first author on request. N = Number of twin pairs.