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Objective: The authors aimed to identify factors associated with long‐acting reversible contraception (LARC) usage. Methods: The current cross‐sectional study used data from the National Survey of Family Growth from 2011 to 2019. Respondents aged 15 to 44 years were included. Those with previous sterilization, infertility, or pregnant were excluded. The outcome evaluated was use of a LARC. Results: Of 61 543 814 women, 44 287 911 (72.0%) met inclusion criteria. The rate of LARC use was 13.4%. Factors associated with an increased likelihood of LARC usage were married/living with a partner (adjusted relative risk [aRR], 1.18 [95% CI, 1.02–1.37]), perceived good health (aRR, 1.44 [95% CI, 1.13–1.84]), year of survey 2017 to 2019 (aRR, 1.53, [95% CI, 1.28–1.83]), one or two past pregnancies (aRR, 1.62 [95% CI, 1.24–2.12]) or three or more past pregnancies (aRR, 1.67 [95% CI, 1.22–2.28]), age at first live birth <20 years (aRR, 1.58 [95% CI, 1.20–2.08]) or 20 to 24 years (aRR, 1.45 [95% CI, 1.13–1.87]), age at onset of sexual activity 13–19 years (aRR, 1.50 [95% CI, 1.26–1.78]), and a 0‐ to 5‐month period of nonintercourse in the past year (aRR, 1.63 [95% CI, 1.40–1.90]). Factors associated with decreased LARC usage were age ≥ 35 years (aRR, 0.74 [95% CI, 0.65–0.85]), being non‐Hispanic Black (aRR, 0.75 [95% CI, 0.62–0.89]) or non‐Hispanic other (aRR, 0.72 [95% CI, 0.59–0.88]), intending to have children (aRR, 0.65 [95% CI, 0.57–0.74]), and never being sexually active (aRR, 0.10 [95% CI, 0.06–0.16]). Conclusions: Using a nationally representative sample of women in the United States, the authors identified modifiable factors associated with LARC use. Results may be used to plan interventional trials to increase LARC usage. Synopsis: Several modifiable factors are associated with the use of long‐acting reversible contraception, used in only about 1 in 10 individuals as a contraceptive method. [ABSTRACT FROM AUTHOR]

Background: Better understanding of the factors associated with formula feeding during the hospital stay can help in identifying potential lactation problems and promote early intervention. Our aim was to ascertain factors associated with exclusive formula feeding in newborns of low‐risk pregnancies. Methods: A population‐based, retrospective study using the United States vital statistics datasets (2014‐2018) evaluating low‐risk pregnancies with a nonanomalous singleton delivery from 37 to 41 weeks. People with hypertensive disorders, or diabetes, were excluded. Primary outcome was newborn feeding (breast vs exclusive formula feeding) during hospital stay. Adjusted relative risks (aRRs) with 95% confidence intervals (CI) were calculated. Results: Of the 19 623 195 live births during the study period, 11 605 242 (59.1%) met inclusion criteria and among them, 1 929 526 (16.6%) were formula fed. Factors associated with formula feeding included: age < 20 years (aRR 1.31 [95% CI 1.31‐1.32]), non‐Hispanic Black (1.42, 1.41‐1.42), high school education (1.69, 1.69‐1.70) or less than high school education (1.94, 1.93, 1.95), Medicaid insurance (1.52, 1.51, 1.52), body mass index (BMI) < 18.5 (1.10, 1.09‐1.10), BMI 25‐29.9 (1.09, 1.09‐1.09), BMI 30‐34.9 (1.19, 1.19‐1.20), BMI 35‐39.9 (1.31, 1.30‐1.31), BMI ≥ 40 (1.43, 1.42‐1.44), multiparity (1.29, 1.29‐1.30), lack of prenatal care (1.49, 1.48‐1.50), smoking (1.75, 1.74‐1.75), and gestational age (ranged from 37 weeks [1.44, 1.43‐1.45] to 40 weeks [1.11, 1.11‐1.12]). Conclusions: Using a large cohort of low‐risk pregnancies, we identified several modifiable factors associated with newborn feeding (eg, prepregnancy BMI, access to prenatal care, and smoking cessation). Improving the breast feeding initiation rate should be a priority in our current practice to ensure equitable care for all neonates. [ABSTRACT FROM AUTHOR]

Background: Better understanding of the factors associated with formula feeding during the hospital stay can help in identifying potential lactation problems and promote early intervention. Our aim was to ascertain factors associated with exclusive formula feeding in newborns of low-risk pregnancies., Methods: A population-based, retrospective study using the United States vital statistics datasets (2014-2018) evaluating low-risk pregnancies with a nonanomalous singleton delivery from 37 to 41 weeks. People with hypertensive disorders, or diabetes, were excluded. Primary outcome was newborn feeding (breast vs exclusive formula feeding) during hospital stay. Adjusted relative risks (aRRs) with 95% confidence intervals (CI) were calculated., Results: Of the 19 623 195 live births during the study period, 11 605 242 (59.1%) met inclusion criteria and among them, 1 929 526 (16.6%) were formula fed. Factors associated with formula feeding included: age < 20 years (aRR 1.31 [95% CI 1.31-1.32]), non-Hispanic Black (1.42, 1.41-1.42), high school education (1.69, 1.69-1.70) or less than high school education (1.94, 1.93, 1.95), Medicaid insurance (1.52, 1.51, 1.52), body mass index (BMI) < 18.5 (1.10, 1.09-1.10), BMI 25-29.9 (1.09, 1.09-1.09), BMI 30-34.9 (1.19, 1.19-1.20), BMI 35-39.9 (1.31, 1.30-1.31), BMI ≥ 40 (1.43, 1.42-1.44), multiparity (1.29, 1.29-1.30), lack of prenatal care (1.49, 1.48-1.50), smoking (1.75, 1.74-1.75), and gestational age (ranged from 37 weeks [1.44, 1.43-1.45] to 40 weeks [1.11, 1.11-1.12])., Conclusions: Using a large cohort of low-risk pregnancies, we identified several modifiable factors associated with newborn feeding (eg, prepregnancy BMI, access to prenatal care, and smoking cessation). Improving the breast feeding initiation rate should be a priority in our current practice to ensure equitable care for all neonates., (© 2023 Wiley Periodicals LLC.)