Advanced age grouping and pregnancy outcomes

Collect clinical data from Hangzhou Obstetrics and Gynecology Hospital in China from 2018 to 2022 using Excel 2016 program, including maternal age, gender, gestational age, fetal information, pregnancy complications, etc., and classify them accordingly. SPSS 21.0 software is used to perform statistical analysis. Chi square test or calibration chi square test is used to compare count data, expressed as n (%). The Bonferroni process is used to compare groups in pairs. Using multiple logistic regression analysis to investigate the impact of advanced age on pregnancy outcomes in pregnant women. Calculate the 95% confidence interval (CI) and odds ratio (OR), with P<0.05 considered statistically significant.