*Subgroup results considering cervical length cutoff point

Progv=vaginal progesterone 90mg/200mg/400mg; Pes=pessary; NoI=control (placebo/no intervention); PP= Pessary+Progesterone, C=cerclage; Prog_IM=17-OH; GA = gestational age

Table 2. Comparative treatment effect of intervention to prevent preterm birth in twin gestations compared to control group for spontaneous PTB<34 weeks and overall PTB<34 weeks