SNAP-II and SNAPPE II

(Score for Neonatal Acute Physiology and SNAP Perinatal Extension)  

Variables

Values

Points

Mean Blood Pressure

Lowest temperature

P02 (mmHg ) / FIO2 (%)

Lowest serum pH

Multiple seizures

Urine output (mL/kg.h)


SNAP II :

Apgar score

Birth weight

Small for gestational age (help)


SNAPPE II : In- hospital mortality : see below

Data are collected within the first 12 hours after admission to the NICU


 

Ref: D K. Richardson et al . SNAP-II and SNAPPE-II: Simplified newborn illness severity and mortality risk scores. J Pediatr 2001; 138: 92-100 

 

 Web page by : Jean-Yves Marandon Centre Chirurgical Marie Lannelongue (France)  

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Gestational age (wk)
3rd percentile birth weight (g)

 

 

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 Calibration of mortality risk model, by birth weight category
(Logistic regression equation is not available)
Observed deaths
Expected deaths

SNAPPE-II

Total

No.

%

No.

%
For all birth weights

0-9

16,274

48

0.3%

51

0.3%

10-19

3,923

61

1.6%

61

1.6%

20-29

1,952

74

3.8%

71

3.6%

30-39

1,262

93

7.4%

101

8.0%

40-49

790

124

15.7%

116

14.7%

50-59

476

105

22.1%

102

21.4%

60-69

310

101

32.6%

100

32.3%

70-79

142

55

38.7%

63

44.4%

> = 80

141

94

66.7%

90

63.8%

Observed deaths
Expected deaths

SNAPPE-II

Total

No.

%

No.

%
For <1500 g

0-9

1,526

9

0.6%

7

0.5%

10-19

1,092

30

2.7%

24

2.2%

20-29

772

40

5.2%

38

4.9%

30-39

645

61

9.5%

60

9.3%

40-49

497

79

15.9%

78

15.7%

50-59

318

72

22.6%

72

22.6%

60-69

260

85

32.7%

84

32.3%

70-79

121

46

38.0%

53

43.8%

> = 80

132

88

66.7%

85

64.4%

;
Observed deaths
Expected deaths

SNAPPE-II

Total

No.

%

No.

%
For >=1500 g

0-9

14,748

39

0.3%

45

0.3%

10-19

2,831

31

1.1%

37

1.3%

20-29

1,180

34

2.9%

33

2.8%

30-39

617

32

5.2%

40

6.5%

40-49

293

45

15.4%

38

13.0%

50-59

158

33

20.9%

30

19.0%

60-69

50

16

32.0%

16

32.0%

70-79

21

9

42.9%

10

47.6%

> = 80

9

6

66.7%

5

55.6%

Patients excluded :

1. Babies released to the regular nursery in <24 hours;
2. Babies admitted to the neonatal intensive care unit at >48 hours of age or after having been discharged home;
3. Moribund infants when an explicit physician decision not to provide life support was made at the time of NICU admission;
4. Babies who died in the delivery room.
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