Table 5.

Subgroup analysis of high-risk women; number of preterm births prior to 34 weeks prevented per dollar spent by strategy with an estimated annual cohort of 280,000^*

Strategy	Number of Preterm Births	Total Cost (100 Million $)	Cost per Preterm Birth Prevented†
No screening or treating (ref)	70,280	112.4	Reference
Sonographic screening; vag p for short cervix	69,440	111.1	$13,226,000
Standard of care; 17-OHP-C	57,680	95.9	$761,400

^*Estimated number of women annually with a history of at least one prior preterm birth (“high-risk”)

^†Compared to no screening or treating