A local group of obstetricians (OB/GYNs) has hired your team to conduct a cohort study among pregnant women seen at their three satellite offices. The study is intended to find out whether a mother’s body mass index (BMI) at 12 weeks gestation influences her risk for preterm delivery. Over a period of six months, you enrolled 600 pregnant women during their first OB appointment at one of the three satellite offices. Women were excluded from the study if they were determined to be beyond 12 weeks gestation at their first appointment or if they had a previous pregnancy that resulted in preterm delivery (before 36 weeks gestation). The BMIs of all participants were measured at 12 weeks gestation and 98 women were considered to have a high BMI (25.0 or greater). After following all of the participants through delivery without any loss to follow-up, you found that 52 women delivered preterm infants, 20 among those who had a high BMI.

How will you set up the 2X2 contingency table for the data?