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Table 1 Means and standard deviations of demographic and Doppler ultrasonographic findings in study population

From: Nomograms of Iranian fetal middle cerebral artery Doppler waveforms and uniformity of their pattern with other populations' nomograms

Gestational age

Number of patients

Age of patients

Patients gravidity

RI

PI

PSV

S/D ratio

20

41

23.25 ± 3.41

1.31 ± 0.60

0.76 ± 0.04

1.72 ± 0.29

20.00 ± 12.23

5.34 ± 1.55

21

48

27.38 ± 6.34

1.79 ± 0.88

0.77 ± 0.06

1.79 ± 0.26

23.15 ± 12.69

5.81 ± 1.90

22

43

26.38 ± 6.37

1.69 ± 0.85

0.76 ± 0.05

1.82 ± 0.28

23.77 ± 11.69

5.91 ± 1.79

23

54

26.74 ± 6.70

1.81 ± 1.03

0.78 ± 0.04

1.94 ± 0.28

22.72 ± 11.02

6.31 ± 1.97

24

45

27.36 ± 5.95

2.00 ± 1.35

0.81 ± 0.05

1.94 ± 0.43

27.92 ± 11.38

6.21 ± 1.61

25

52

25.23 ± 5.21

1.81 ± 0.98

0.81 ± 0.05

1.90 ± 0.36

27.14 ± 9.20

6.38 ± 1.59

26

44

27.79 ± 4.51

1.74 ± 0.80

0.82 ± 0.05

1.95 ± 0.39

30.56 ± 10.14

6.36 ± 1.47

27

42

27.10 ± 5.31

2.10 ± 1.04

0.83 ± 0.04

2.03 ± 0.38

36.13 ± 9.37

6.69 ± 1.37

28

41

26.50 ± 3.62

1.60 ± 0.69

0.85 ± 0.07

2.05 ± 0.49

37.24 ± 6.60

6.95 ± 1.64

29

55

25.97 ± 5.56

1.60 ± 0.85

0.84 ± 0.05

2.02 ± 0.40

36.54 ± 9.70

6.87 ± 1.46

30

46

26.50 ± 4.47

1.70 ± 0.82

0.83 ± 0.04

1.98 ± 0.34

46.42 ± 11.16

7.13 ± 1.35

31

50

27.53 ± 7.70

1.57 ± 0.77

0.82 ± 0.04

1.97 ± 0.35

41.24 ± 10.14

6.60 ± 1.66

32

46

27.29 ± 5.97

2.06 ± 0.82

0.82 ± 0.07

1.92 ± 0.33

49.28 ± 9.77

7.09 ± 2.21

33

47

27.30 ± 4.78

1.52 ± 0.73

0.79 ± 0.06

1.76 ± 0.30

47.30 ± 10.73

5.84 ± 2.00

34

42

27.05 ± 6.02

1.81 ± 0.98

0.79 ± 0.04

1.79 ± 0.28

57.10 ± 9.29

5.10 ± 1.18

35

49

29.21 ± 4.65

2.26 ± 1.36

0.80 ± 0.05

1.75 ± 0.33

52.06 ± 9.61

5.33 ± 1.84

36

48

27.92 ± 5.62

2.33 ± 1.09

0.75 ± 0.05

1.54 ± 0.26

56.65 ± 12.2

4.31 ± 1.15

37

43

27.94 ± 5.05

1.63 ± 0.88

0.73 ± 0.07

1.43 ± 0.31

53.93 ± 16.34

4.12 ± 1.31

38

51

25.29 ± 5.65

1.53 ± 0.80

0.68 ± 0.06

1.25 ± 0.21

56.97 ± 15.91

3.22 ± 0.67

39

45

28.33 ± 5.66

2.27 ± 1.43

0.68 ± 0.05

1.23 ± 0.15

60.85 ± 18.96

3.22 ± 0.46

40

46

26.50 ± 2.33

1.63 ± 0.51

0.67 ± 0.04

1.23 ± 0.16

54.42 ± 23.48

3.16 ± 0.44