Author Interviews, OBGYNE, Pediatrics / 04.02.2020
More Cesarean Deliveries Linked to Decline in US Birth Weights
MedicalResearch.com Interview with:
[caption id="attachment_53073" align="alignleft" width="179"]
Andrea Tilstra[/caption]
Andrea M. Tilstra
Doctoral Candidate, Department of Sociology
Population Program, Institute of Behavioral Science
University of Colorado Boulder
MedicalResearch.com: What is the background for this study?
Response: Average U.S. birth weight declined across the 1990s and 2000s, and this has puzzled most researchers. We investigate this and find that the increases in cesarean deliveries and induction of labor between 1990 and 2013 resulted in a shift in the gestational age distribution of U.S. births.
We find that births are less likely to occur at gestational weeks 40+ and much more likely to occur between weeks 37-39. Additionally, results from our simulations show that if U.S. rates of cesarean deliveries and labor induction had not increased over time, then average birth weight would have increased.
Andrea Tilstra[/caption]
Andrea M. Tilstra
Doctoral Candidate, Department of Sociology
Population Program, Institute of Behavioral Science
University of Colorado Boulder
MedicalResearch.com: What is the background for this study?
Response: Average U.S. birth weight declined across the 1990s and 2000s, and this has puzzled most researchers. We investigate this and find that the increases in cesarean deliveries and induction of labor between 1990 and 2013 resulted in a shift in the gestational age distribution of U.S. births.
We find that births are less likely to occur at gestational weeks 40+ and much more likely to occur between weeks 37-39. Additionally, results from our simulations show that if U.S. rates of cesarean deliveries and labor induction had not increased over time, then average birth weight would have increased.
Dr. Little[/caption]
MedicalResearch.com Interview with:
Dr. Sarah Elizabeth Little, MD
Obstetrics/Gynecology
Department of Obstetrics and Gynecology
Brigham and Women's Hospital
Medical Research: What is the background for this study? What are the main findings?
Dr. Little: This study investigates the variation in cesarean delivery rates across hospital services areas (a geographic unit designed by the Dartmouth Atlas to represent local markets for primarily hospital-based medical services). We looked at whether variation in cesarean delivery rates was related to broader variation in overall medical spending and utilization in that area, which we measured with Medicare spending and hospital use at the end-of-life. We found that an area’s cesarean delivery rate was correlated with these other measures; in other words, the hospital services areas that are doing the most cesarean deliveries are the same ones that are spending more and doing more to non-obstetric patients as well.