Figure 4.

Recurrent preterm birth (<37 weeks) in the third pregnancy by term vs preterm birth in the first and second births, 2001-2015 (n = 544,665). Unadjusted (filled diamonds) and adjusted (open diamonds) odds ratio by mother’s residential area, household overcrowding, mother’s self-declared race/skin color, mother’s level of education, mother’s marital status, number of prenatal visits, maternal age, type of delivery, and newborn’s year of birth at the time of the first birth