Statistical Analysis
Data analysis was performed using SPSS (version 20; SPSS Inc).
Continuous variables of clinical characteristics were displayed as
mean±standard deviation and compared by t-test. Parameters not normally
distributed were presented as median(inter-quartile range) and compared
by nonparametric test. Correlation between different variables was
analyzed by Pearson correlation analysis and linear regression analysis.
Receiver operating characteristic (ROC) curve were used for the
independent predictive analysis. Binary logistic regression was used to
assess the relationships between variables and incidence of PCOS. All
values of P < 0.05 for two-side tests were considered
statistically significant.