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The association between exposure to loss of a first-degree relative in early life and schizophrenia: stratification analyses by the baseline characteristics. ∗aIRRs were adjusted for country, child age, child sex, calendar year period, paternal age, family history of psychiatric disorders, and maternal variables (age, parity, education, social status, and maternal origin). aIRR = adjusted incidence rate ratio, CI = confidence interval.
