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Table 1 Maternal data by gestational age in weeks

From: Short-term respiratory outcomes in late preterm infants

 

34

35

36

LPI

37

38

39

40

41

TI

34-41

 

n = 151

n = 241

n = 458

n = 850

n = 1149

n = 2444

n = 3343

n = 3729

n = 2261

n = 12926

n = 13776

Age

           

Mean (SD)

32.4(5.4)

31.7(6.6)

32.9(4.8)

32.5(5.5)

32.7(5.2)

32.5(5.1)

32.1(5.0)

32.1(5.1)

31.9(5.0)

32.2(5.1)

32.2(5.2)

Number of US ***

           

Mean (SD)

4.7(2.3)

5.0(2.8)

5.2(4.7)

5.1(4.0)

4.5(3.4)

4.0(2.2)

3.6(1.6)

3.5(1.5)

3.5(2.0)

3.7(2.0)

3.9(2.1)

Ethnicity

           

Caucasian

119(89.5)

181(85.0)

357(86.9)

657(86.8)

933(88.0)

1953(85.8)

2722(88.1)

3097(88.6)

1852(88.0)

10557(87.8)

11214(81.4)

African

7(5.3)

10(4.7)

21(5.1)

38(5.0)

51(4.8)

115(5.1)

135(4.4)

155(4.4)

115(5.5)

571(4.8)

609(4.4)

Hispanic

3(2.3)

18(8.4)

22(5.4)

43(5.7)

41(3.9)

112(4.9)

138(4.5)

128(3.7)

71(3.4)

490(4.0)

533(3.8)

Asian

4(3.0)

4(1.9)

11(2.7)

19(2.5)

35(3.3)

97(4.3)

94(3.0)

114(3.3)

67(3.2)

407(3.4)

426(3.1)

ART ***

           

Yes

4(2.9)

3(1.3)

6(1.3)

13(1.6)

16(1.4)

12(0.5)

15(0.5)

14(0.4)

7(0.3)

64(0.5)

73(0.5)

Medical disorders ***

           

Yes

53(45.7)

83(40.5)

128(32.6)

264(37.0)

281(27.6)

422(18.8)

265(8.6)

288(8.4)

151(7.4)

1407(11.9)

1671(12.1)

  1. Data are expressed as absolute numbers and proportions (%) of observed data in each category, unless otherwise specified. All tests refer to comparisons between late preterm infants (LPI) and term infants (TI). US ultrasounds; ART assisted reproductive technologies. ***P < .001, using χ2, Fisher or t test as appropriate.