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. 2023 Dec 19;9(1):90. doi: 10.1038/s41537-023-00416-2

Table 1.

Foetal origins and the odds of Schizophrenia.

Study Country and date Odds ratio
Susser et al.20 Netherlands 1944–45 2.0 (95% CI: 1.2–3.4)
St. Clair et al.23 China 1959–61

2.30 (95% CI: 1.99–2.65) (births in 1960)

1.93 (95% CI: 1.68–2.23) (births in 1961)
Xu et al.24 China 1959–61

1.68 (95% CI: 1.48–1.92) (births in 1960)

25 (95% CI: 2.00–2.52) (births in 1961)
He et al.25 China 1959–61 1.82 (95% CI: 1.11–2.98)

The odds ratio is the ratio of an event occurring in a treatment group to the odds of an event occurring in a control group.