Data analysis
The chi-square test was used to analyze the differences in paternal
perinatal depression and independent variables, including the stages of
COVID-19 epidemic, family function, demographic variables (age,
ethnicity, education, Hukou, family income, insurance, and first-time
father), and health behaviour factors (sleep quality, smoking, drinking,
and exercise). Multiple logistic regression analyses were used to
evaluate the effects of the independent variables on paternal perinatal
depression. Model 1 only included the periods of COVID-19 epidemic and
family function. Model 2 included demographic variables on the basis of
model 1. Model 3 included health behaviour factors on the bases of model
2. The results of multiple logistic regression analyses are reported as
adjusted odds ratios (OR) and 95% confidence intervals (CI). All tests
were two-sided and p-values less than 0.05 were considered statistically
significant. Statistical analyses were performed using SAS 9.4 for
Windows.