Table 2. Univariate and multivariate Odds Ratios (OR) and 95% confidence intervals (CI) for the association between maternal cat ownership in pregnancy and between the ages of 8 months and 4 years of the child and psychotic symptoms (suspected or definite vs. none) at age 13 and 18 (N includes exposure and confounding variables imputed with multiple imputation with chained equations, N=100 imputations).

	Psychotic experiences age 13 (suspected or definite vs. none) N= 6,705
Exposure variable	Crude OR (95%CI)	Adjusted OR (95%CI)
Cat Ownership in pregnancy
No	Ref	Ref
Yes	1.15 (0.97; 1.35)	1.15 (0.97; 1.36)
Cat Ownership at age 4
No	Ref	Ref
Yes	1.23 (1.04; 1.46)**	1.18 (0.94; 1.48)
Cat Ownership at age 10
No	Ref	Ref
Yes	1.19 (1.00; 1.41)**	1.12 (0.92; 1.36)
	Psychotic experiences age 18 (suspected or definite vs. none) N= 4,676
Exposure variable	Crude OR (95%CI)	Adjustment 1a OR (95%CI)
Cat Ownership in pregnancy
No	Ref	Ref
Yes	1.08 (0.86; 1.35)	1.08 (0.85; 1.37)
Cat Ownership at age 4
No	Ref	Ref
Yes	1.11 (0.88; 1.40)	0.97 (0.71; 1.31)
Cat Ownership at age 10
No	Ref	Ref
Yes	1.15 (0.89; 1.48)	1.08 (0.82; 1.45)

^**p≤0.05

^a= Model of cat ownership in pregnancy is adjusted for child ethnicity; maternal education, marital status, and social class; paternal age; number of house moves until age 4, type of house, crowding index. Models of cat ownership in at age four and ten years are further adjusted for cat ownership in pregnancy.