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Table 1 Baseline characteristics

From: Circulating angiogenic factors and HIV among pregnant women in Zambia: a nested case–control study

Characteristic

N

HIV-

N

HIV + 

p-value*

% or

Median (IQR)

% or

Median (IQR)

Age, years

53

27 (24—31)

57

29 (24—34)

0.20

 < 20

2

3.77

2

3.51

0.95

 20–34

42

79.25

44

77.19

 

  ≥ 35

9

16.98

11

19.30

 

 Missing

4

 

0

  

Marital status

    

 > 0.99

 Not married and not cohabiting

6

10.53

6

10.53

 

 Married or cohabiting

51

89.47

51

89.47

 

 Missing

0

 

0

  

BMI, kg/m2

56

25.83 (21.09—29.57)

55

23.87 (21.45—28.32)

0.20

 < 18.5

3

5.36

5

9.09

0.64

 18.5—30.0

40

71.43

40

72.73

 

  > 30

13

23.21

10

18.18

 

Missing

1

 

2

  

Gestational age at specimen collection, weeks

57

12.71 (10.71—14.86)

57

12.57 (10.43—14.86)

0.90

  < 14, weeks

36

63.16

36

63.16

1.00

  ≥ 14

21

36.84

21

36.84

 

Parity

57

1 (0—2)

57

2 (1—3)

 > 0.01

Nulliparous

23

40.35

5

8.77

 > 0.01

Parous

34

59.65

52

91.23

 

Prior PTB among parous, n = 86

 no prior PTB

14

41.18

31

59.62

0.09

  ≥ 1 prior PTB

20

58.82

21

40.38

 

Prior stillbirth among parous, n = 86

 no prior SB

24

72.73

41

85.42

0.20

  ≥ 1 prior SB

9

27.27

7

14.58

 

Missing

1

 

4

  

Blood pressure at enrollment

 Normotensive

53

94.64

52

92.86

0.70

 Hypertensive

3

5.36

4

7.14

 

 Missing

1

 

1

  

Syphilis at enrollment

 Non-reactive

53

94.64

49

87.50

0.20

 Reactive

3

5.36

7

12.50

 

 Missing

1

 

1

  

Hemoglobin at enrollment, mg/dL

47

12 (12—13)

45

12 (11—13)

0.50

  ≥ 11

45

95.74

38

84.44

0.07

  < 11

2

4.26

7

15.56

 

 Missing

10

 

12

  

Malaria at enrollment

 Negative

41

100.00

49

98.00

0.40

 Positive

0

0.00

1

2.00

 

 Missing

16

 

7

  

Urinalysis at enrollment

 Normal

52

92.86

51

89.47

0.50

 Abnormala

4

7.14

6

10.53

 

 Missing

1

 

0

  
  1. * p-value calculated using Wilcoxon ranksum test for continuous variables and chi-square for categorical variables
  2. a Defined as 1 + leukocyte esterase and/or + nitrates