Univariate analysis of the correlation between IPIs and pregnancy
outcomes (Table 2)
Compared with the other three groups, women with an IPI of 120 months or
greater had a higher rate of GHP (6.1%, p < 0.036) and GDM
(34.9%, p = 0.001). There were statistically significant differences in
the incidence of uterine rupture among the four groups (p = 0.041), and
the proportion of uterine rupture in women with an IPI of 120 months or
greater (4.9%, n = 12) was significantly lower than that among women in
the other three groups. No significant difference was found across the
four groups regarding to maternal outcomes, including anemia, low
placenta, placenta previa, pernicious placenta, placenta accreta,
placental abruption, PROM, PPH, and hysterectomy. Groups with an IPI of
less than 24 months (4.1%, n = 5) and an IPI of 120 months or greater
(6.1%, n = 15) were more likely to deliver before 34 weeks of gestation
(p = 0.002). Babies in the group of women whose IPI was equal to or
greater than 120 months had significantly lower birth weights (p= 0.017) and shorter birth lengths (p = 0.035) than those in the
other three groups. No significant difference was found across the four
groups regarding to perinatal outcomes, including low 1-min Apgar score,
LBW
and admission to the NICU.