*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;
ProgIM=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