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Table 1 Clinical characteristics of study population

From: Morbidity associated with patent ductus arteriosus in preterm newborns: a retrospective case-control study

 

Overall

Gestational Age ≤ 28 weeks and Birth Weight

≤ 1000 g

Case Group

(n = 85)

Control Group

(n = 193)

Case Group

(n = 41)

Control Group

(n = 18)

Female sex, N. (%)

41 (48.2)

87 (45.1)

22 (53.7)

8 (44.4)

Gestational Age, weeks

27.6 (27.1 to 28.0) *

30.1(29.7 to 30.4)

25.9 (25.4 to 26.4)

26.0 (25.1 to 26.9)

Birth weight, g

1024 (952 to 1097) *

1310 (1263 to 1358)

754.1 (709.6 to 798.6)

769.5 (681.2 to 875.8)

Twins, N. (%)

23 (27.1)

54 (28.0)

8 (19.5)

5 (27.8)

Cesarean Section, N. (%)

69 (82.1)

168 (88.4)

27 (65.8)

13 (72.2)

Antenatal steroids a, N. (%)

49 (59.8) *

139 (73.5)

28 (68.3)

12 (66.7)

Pregnancy-induced hypertension, N. (%)

20 (26.3)

46 (24.1)

14 (34.1) *

1 (5.5)

Alteration of doppler velocimetry of uterine arteries, N. (%)

14 (19.4)

35 (18.5)

3 (7.3)

3 (16.7)

pH on cord blood

7.2 (7.2 to 7.3) *

7.3 (7.2 to 7.3)

7.2 (7.2 to 7.3)

7.2 (7.2 to 7.3)

5-min Apgar score

7 (6 to 7) *

8 (7 to 8)

6.6 (6.1 to 7.1)

7.1 (6.5 to 7.6)

  1. Data were expressed as mean (95% CI), when not specified
  2. (a) Intramuscular steroid cycle in two doses of 12 mg over a 24-h period; * vs Control Group p < 0.05.