Table 8 The pre-ductal PPI curves L, M and S parameters and percentile pre-ductal PPI by gestational age in female 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

18

−0.02

1.97

0.48

0.76

1.05

1.44

1.97

2.72

3.76

5.19

36

21

−0.01

2.02

0.48

0.77

1.07

1.47

2.02

2.78

3.84

5.30

37

97

−0.01

2.18

0.48

0.84

1.15

1.59

2.18

3.00

4.14

5.71

38

359

−0.02

2.26

0.48

0.88

1.20

1.64

2.26

3.11

4.28

5.92

39

571

−0.04

2.17

0.49

0.83

1.14

1.57

2.17

3.01

4.19

5.85

40

460

−0.04

2.33

0.51

0.85

1.19

1.66

2.33

3.28

4.63

6.58

41

232

−0.04

2.46

0.54

0.85

1.21

1.72

2.46

3.53

5.09

7.39

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