Statistical analysis
We calculated the exact numbers and proportions for all variables in Wuhan, Chongqing, and the total for the two cities. Cronbach’s alpha was used to assess the reliability of the anxiety scale. To compare the distribution of background, attitude, anxiety, and obstetrical choices between the two cities, the Chi-squared test, Kruskal-Wallis test and Student’s t test were used in accordance with the type of data.
All factors related to pregnant women’s background and their attitude towards COVID-19 were selected as independent variables. We used stepwise logistic regression models to estimate the effect of these factors on the anxiety status.
The Statistics Analysis Software version 9.4 (SAS Institute Inc, Cary, NC, USA) was used and a significance level of p-value < 0.05 was applied. Figures we presented were plotted with PRISM version 8.0 for windows (GraphPad Software Inc, San Diego, CA).