Figure 2

Rate of impaired cardiac diastolic function in different group divided by age and parity. Advanced age was defined as maternal age ≥ 35 years and young age was defined as maternal age < 35 years. Rate of impaired cardiac diastolic function was defined as number of impaired cardiac diastolic function in each group divided by total number of the corresponding group. Kruskal–Wallis test was used to analysis the statistical difference.