From: Family structure and risk factors for schizophrenia: case-sibling study
Lowest age-at-onset in the sibship | |
Sex of the youngest proband (female vs. male) | 0.983(0.864, 1.117) |
under 20 | (reference) |
20–25 | 0.574(0.497, 0.664) |
26–30 | 0.323(0.267, 0.391) |
over 30 | 0.156(0.116, 0.209) |
Family size | |
2 | (reference) |
3 | 1.128(0.943, 1.349) |
4 | 1.282(1.043, 1.575) |
5+ | 1.286(1.019, 1.623) |
Mother schizophrenic(no vs. yes) | 1.822(1.431, 2.321) |