Table 4 The pre-ductal PPI curves L, M and S parameters and percentile pre-ductal PPI by gestational age in all newborns.

From: Peripheral perfusion index percentiles for healthy newborns by gestational age and sex in China

Age

n

L

M

S

Percentiles

3rd

10th

25th

50th

75th

90th

97th

35

40

−0.13

1.99

0.48

0.80

1.07

1.45

1.99

2.76

3.90

5.59

36

41

−0.09

2.02

0.49

0.79

1.07

1.46

2.02

2.81

3.96

5.63

37

241

−0.06

2.15

0.49

0.82

1.13

1.55

2.15

2.99

4.20

5.93

38

855

−0.04

2.19

0.49

0.83

1.15

1.58

2.19

3.06

4.28

6.01

39

1219

−0.02

2.20

0.50

0.82

1.14

1.58

2.20

3.06

4.29

6.02

40

962

0.01

2.30

0.51

0.81

1.15

1.63

2.30

3.23

4.55

6.38

41

456

0.05

2.38

0.54

0.79

1.15

1.66

2.38

3.39

4.81

6.78

  1. GA, gestational age (e.g. 36 weeks represent 36 weeks + 0 day to + 6 days). LMS, Lambda Mu Sigma.
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