Association of Socioeconomic Variables with Primary Cesarean Section.

Objectives: Socioeconomic characteristics may be associated with cesarean section (CS) rates. We probe the relationship between socioeconomic variables and primary cesarean section (PCS) by studying indicators of socioeconomic status (SES) in a population-based study in New York City.

Methods: This was a retrospective study of all 80,506 women in New York City who gave birth to a live child during 2018, and who met inclusion and exclusion criteria. Data were drawn from the New York City Department of Health and Mental Hygiene and the US Census. The main outcome measure was performance of PCS as compared with vaginal birth.

Results: Approximately 21% of neonates were delivered by PCS. Multivariate multilevel mixed-effects logistic regression analysis showed higher odds for PCS for women with an upper-middle class median household income of US$108,500 to $380,499 (odds ratio [OR] 1.37, 95% confidence interval [CI] 1.07-1.76, P = 0.001), and the percentage enrolled in the Supplemental Nutrition Assistance Program (OR 1.01, 95% CI 1.001-1.012, P = 0.02). Lower odds for PCS occurred for all middle-class categories of per capita income: US$32,500 to $54,499 (OR 0.91, 95% CI 0.84-0.99, P = 0.02), US$54,500 to $108,499 (OR 0.76, 95% CI 0.66-0.88, P < 0.001), and US$108,500 to $380,499 (OR 0.80, 95% CI 0.66-0.96, P = 0.02). No significant association occurred for women receiving public assistance.

Conclusions: Patient preferences in favor or against CS may be related to SES. There may be conflicts between obstetric care that is maximally beneficial and a patient's desire for delivery mode. Clinicians should be aware of the potential implications of this dilemma.