Objective
To measure rates of long-acting reversible contraception (LARC), including intrauterine devices and contraceptive implants, and tubal sterilization during delivery hospitalizations, and correlates of their use.
Methods
This retrospective cohort study used the 2008–2013 National Inpatient Sample, a publicly-available all-payer database. We identified delivery hospitalizations with the International Classification of Diseases, 9th Revision, Clinical Modification codes for intrauterine device insertion, contraceptive implant insertion, and tubal sterilization. We used weighted multivariable logistic regression to examine associations between predictors, (age, delivery mode, medical comorbidity, payer, hospital type, geographic region, and year), and likelihood of LARC and sterilization, and to compare characteristics of LARC and sterilization users.
Results
Our sample included 4,691,683 discharges, representing 22,667,204 delivery hospitalizations. LARC insertion increased from 1.86 per 10,000 deliveries (2008–2009) to 13.5 per 10,000 deliveries (2012–2013; p<0.001); tubal sterilization remained stable (711 to 683 per 10,000 deliveries; p=0.24). In multivariable analysis adjusting for all predictors, compared to neither LARC nor sterilization, LARC use was highest among women with medical comorbidity (count per 10,000 deliveries: 15.04, standard error [SE]= 2.11; adjusted odds ratio [aOR]=1.92; 95% confidence interval 1.72–2.13), non-private payer (13.50, SE=2.14; aOR=5.23; 3.82–7.16), and at urban teaching hospitals (14.92, SE=2.25; aOR=20.85, 12.73–34.15). Sterilization was least likely among women age ≤24 years (251.04, SE=4.88; aOR=0.12, 0.12–0.13, versus ≥35 years) and most likely with cesarean delivery (1568.74, SE=20.81; aOR=6.25, 5.88–6.63). Comparing only LARC and sterilization users, LARC users tended to have non-private insurance (84.95% vs. 57.17%, aOR=1.90; 1.38–2.63) and deliver at urban teaching hospitals (94.65% vs. 45.47%, aOR=38.39; 23.52–62.64) in later study years (2012–2013; 55.72% vs. 32.18%, aOR=8.26; 4.42–15.44, versus 2008–2009).
Conclusion
LARC insertion increased from 1.86 to 13.5 per 10,000 deliveries but remained less than 2% of the sterilization rate. Inpatient postpartum LARC insertion is more likely among sicker, poorer women delivering at urban teaching hospitals.