A matched case-control study on perinatal risk factors of early onset thrombocytopenia in full-term small for gestational age infants / 临床儿科杂志

Objective To explore the perinatal risk factors of early onset thrombocytopenia (EOT) in full-term small for gestational age infants. Methods A 1:1 or 1:2 matched case control study was carried out. A total of 93 full-term small for gestational age infants with EOT were selected from April 2008 to July 2014 as the case group, and the non EOT full-term small for gestational age infants with the birth weight difference <250 g and the gestational age difference <3 days were selected as the control group. The clinical data during perinatal period and laboratory examination results after admission were collected retrospectively. And the differences between the two groups were compared. Results The incidence of intrauterine distress (41.9％ vs. 25.8％, χ2=7.35, P=0.007), amniotic fluid contamination (39.8％ vs. 27％, χ2=4.66, P=0.031), and early-onset sepsis (39.8％ vs. 27％, χ2=4.66, P=0.031) were significantly higher in the case group than those in the control group. Conditional logistics regression analysis showed that intrauterine distress (β=0.60, OR=1.82, 95％CI=1.04～3.17, P=0.035) and early-onset sepsis (β=1.69, OR=5.44, 95％CI=1.11～26.76, P=0.037) were related to EOT. Conclusions Intrauterine distress and early-onset sepsis are risk factors for the onset of EOT in full-term small for gestational age infants.

Perinatal Outcome in Preterm Infants with Abnormal Umbilical Artery Doppler Results : Emphasizing on Early Onset Thrombocytopenia and its Risk Factors

PURPOSE:Umbilical artery Doppler study is a commonly used non-invasive tool in high risk pregnancies because of its good correlation with the degree of placental insufficiency. We analyzed hematologic profiles and perinatal outcome of preterm infants with abnormal umbilical artery Doppler results and the risk factors of early onset thrombocytopenia. METHODS:We retrospectively reviewed the medical records of preterm infants under 35 weeks of gestational age at birth who were admitted to the neonatal intensive care unit of Seoul National University Children's Hospital from January 1, 2002 through December 31, 2004, and whose mothers had undergone umbilical artery Doppler studies within 5 days before delivery. Sixty two neonates were divided into three groups; the 1st group was defined as the patients with normal umbilical artery (UA) systolic/diastolic (S/D) ratio, the 2nd group, with increased UA S/D ratio above 95 percentile, and the 3rd, with absent or reversed end-diastolic flow (AREDF). RESULTS:Mean nucleated red blood cell (nRBC) counts per 100 white blood cells (WBCs) were 14.2 (0-150), 91.0 (0-262), 301.4 (6-884) (P<0.001), mean WBC counts were 10.8 (0- 34.1), 9.2(3.4-23.9), 5.9(0.5-15.2) (x1,000/mm(3)) (P=0.007), and mean platelet counts were 215.5+/-69.2, 185.9+/-96.7, 100.2+/-50.3 (x1,000/mL) (