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A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
Published on: January 12, 2018
Recurrence risk of preterm births: a retrospective Indian study
Anitha Reddy Depa1, Sirisha Rao Gundabattula2
1Department of Obstetrics, Fernandez Hospital, Hyderabad, India.
Insights
Preterm birth recurrence in India mirrors Western rates, affecting 31.6% of mothers. Preeclampsia significantly increases this risk, highlighting its importance in prevention strategies.
Area of Science:
- Obstetrics and Gynecology
- Neonatal Health
- Public Health
Background:
- Preterm birth (PTB) is a major cause of neonatal mortality globally.
- India bears the largest burden of PTBs worldwide.
- Understanding PTB recurrence is crucial for improving maternal and infant outcomes.
Purpose of the Study:
- To determine the recurrence rate of preterm birth (PTB) in an Indian population.
- To identify factors associated with PTB recurrence.
- To provide data for improved PTB prevention strategies in India.
Main Methods:
- Retrospective study of women with singleton preterm deliveries (2009-2010) and subsequent deliveries by March 2016.
- Stratification of PTBs into spontaneous and indicated categories.
- Analysis of demographic data and maternal/neonatal outcomes from medical records and telephone inquiries.
Main Results:
- The overall PTB recurrence rate was 31.6% (29.1% for spontaneous, 34.0% for indicated).
- Recurrence rates are comparable to those observed in Western populations.
- Preeclampsia was significantly associated with PTB recurrence (OR 7.10, p < .001).
- In 75% of cases, the type of recurrent PTB matched the initial PTB.
Conclusions:
- The recurrence risk of preterm birth in India is substantial and similar to Western countries.
- Preeclampsia is a key risk factor for recurrent preterm birth, emphasizing the need for its prevention.
- Findings aid in counselling women with prior PTBs and guide future research on PE prediction and prevention.
Abstract:
Preterm birth (PTB) is the leading cause of neonatal deaths and India is the biggest contributor to the global burden of PTBs. This study aimed to determine the risk of recurrence of PTBs and factors associated with recurrence among mothers delivered at a tertiary care perinatal centre in India. This retrospective study comprised women who had delivered singleton preterm babies (24-37 weeks of gestation and weighing ≥500 g) in 2009 and 2010, and had subsequent deliveries beyond 24 weeks of gestation by the end of March 2016. Preterm births were stratified as spontaneous and those with an indication for delivery. Information on demographic data and maternal and neonatal outcomes was accessed from the case records or enquired over telephone. Among 291 eligible women, the recurrence rate of PTB was 31.6%; 29.1% for prior spontaneous and 34.0% for indicated preterm deliveries. This recurrence risk is similar to that in the western populations. In 75.0% of the cases, the type of recurrent PTB corresponded to the index PTB. Preeclampsia (PE) was significantly associated with recurrence (OR 7.10; 95% CI: 3.33, 15.11; p < .001); thus, prevention of PE is a key component in the prevention of PTB.Impact StatementWhat is already known on this subject? Preventing preterm birth (PTB) remains a challenge because the causes of PTBs are numerous, complex and poorly understood. Spontaneous PTB before 34 weeks of gestation is a strong predictor of subsequent spontaneous PTB. Spontaneous PTB is not only associated with increased recurrence of spontaneous but also medically indicated PTB and vice versa. Risk factors may vary by the clinical subtype of the most recent PTB.What the results of this study add? Despite the highest reported number of PTBs, there are no data on recurrence from India. This study reveals that the recurrence rate of PTBs in an Indian population appears to mirror the rates in the developed nations and preeclampsia (PE) is strongly associated with recurrence.What the implications are of these findings for clinical practice and/or future research? The results of this study are useful for counselling women who had previous PTBs regarding their future obstetric outcomes. Focussed research on prediction and prevention of PE is an essential element in the algorithm for prevention of PTBs.
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