Table 1.
Demographic characteristics of the study population.
Table 2.
Age group of exposure to first pet dog by diagnostic group.
Table 3.
Age group of exposure to first pet cat by diagnostic group.
Fig 1.
Kaplan Meier plot depicting accumulated proportion of exposure to first household pet dog stratified by diagnostic group.
The group of individuals with schizophrenia differed from the control group (Hazard Ratio (HR) = .75 95% CI .63-.90, p < .002, adjusted for age, gender, race/ethnicity, parental education, and place of birth). The group of individuals with bipolar disorder did not differ significantly from the control group.
Fig 2.
Kaplan Meier plot depicting accumulated proportion of exposure to first household pet dog stratified by diagnostic group censored for prior exposure to a household pet cat.
The age distribution of the censored population is shown in S1 Table. The group of individuals with a schizophrenia diagnosis differed from the control group (HR .76, 95% CI .63 -.91, p < .002 adjusted for age, gender, race/ethnicity, parental education, and place of birth). The group of individuals with bipolar disorder did not differ significantly from the control group. The numbers shown indicate the total population including those who were censored.
Fig 3.
Kaplan Meier plot depicting accumulated proportion of exposure to first household pet cat stratified by diagnostic group.
The differences among the groups was not statistically significant (p < .1).
Fig 4.
Kaplan-Meier plot depicting accumulated proportion of exposure to first household pet cat stratified by diagnostic group censored for prior exposure to a household pet dog.
The age distribution of the censored population is shown in S2 Table. The differences among the groups was not statistically significant (p < .1). The numbers shown indicate the total population including those who were censored.
Fig 5.
Mean and 95% confidence intervals of relative risks associated with the first household pet dog in the indicated age groups.
The relative risks were calculated using multivariate regression models employing age, gender, race, maternal education, and place of birth as covariates. Data are shown for the entire population and the population which did not have prior household exposure to a pet cat.
Fig 6.
Mean and 95% confidence intervals of relative risks associated with the first household pet cat in the indicated age groups.
The relative risks were calculated using multivariate regression models employing age, gender, race, maternal education, and place of birth as covariates. Data are shown for the entire population and the population which did not have prior household exposure to a pet dog.