Table 5: Number of cases of acute respiratory disease prevented and dollars saved through administration of ACS to hypothetical late-preterm birth cohort, assuming base-case estimates and late-preterm birth rate approximately 331,500 infants.

Strategy Cases ARD ()* Cases ARD prevented ()* Cost saved ($ millions) 34 weeks ACS with labor 7072 7426 26.0 34 weeks No ACS (Reference) 14498 Reference Reference 35 weeks ACS with labor 3536 3536 6.0 35 weeks No ACS (Reference) 7072 Reference Reference 36 weeks ACS with labor 2122 1414 −3.4 36 weeks No ACS (Reference) 3536 Reference Reference

*Assumes that prevalence of late-preterm live singletons delivered annually (331,500) is divided equally between each gestational age week. ACS: antenatal corticosteroids; ARD: acute respiratory disease.