Namavar Jahromi et al. Table 3: Pregnancy outcome of the women with preterm spontaneous uterine contractions who were followed up to delivery (The data are presented as n (%) or mean± SD) Group 1 Group 2 Group 3 P value singletons twins triplets n=200 n=21 n=3 261.7±20.1 238±24.27 231.6±7.37 <0.001a Mean gestational age at delivery (days) 730.0±628.2 245.4±246.5 139.9±198.9 <0.001a Mean time interval between admission and delivery( hours) Preterm delivery <259 days 98 (49) 20 (95.2) 3 (100) 0.001 Cesarean delivery 106 (53) 18 (85.7) 3 (100) 0.003 Vaginal delivery 94 (47) 3 (14.28) 0 0.003 <0.001a Mean birth weight (gr) 2855.2±655.37 1947.89±670.7 1707.7±420.8 Female 98 (49) 14 (33.33) 5 (55.5) 0.149 Neonates who had NICU admission 30 (15) 17 (44.7) 7 (77.7) <0.001 <0.001a Mean of NICU admitted hours 127.9±178.9 290.2±277.7 366.9±251.9 Death 6 (3) 4 (3) 0 0.147 a The mean difference is significant between group (1, 2) and (1, 3) Fig. 1: Outcome of pregnancies who were admitted for preterm spontaneous uterine contractions. and 315 cases (96.3%) were classified as threatened PLP.3 We were able to follow 224 of these women up to the time of delivery and found that 121 (54%) women had preterm deliveries before 259 days. Considering the time interval between admission and delivery in the true PLP group showed that ACOG criteria identified the women which were truly in labor and usually no therapeutic modality was able 880 WWW.ircmj.com Vol 13 December 2011