Broughton et al developed the Mortality Index for Neonatal Transportation (MINT) score for the transport of critically ill neonates. This can help identify neonates at high risk for mortality. The authors are from King's College London, New South Wales Newborn and Pediatric Emergency Transport Service and the University of Sydney in Australia.
Parameters:
(1) postnatal age in hours
(2) Apgar score at 1 minute
(3) birth weight in grams
(4) PaO2 in mm Hg
(5) pH
(6) congenital abnormality
(7) intubated at time of call
X =
= (0.29 * (Apgar score at 1 minute)) - (0.025 * (postnatal age in hours)) + (0.002 * (birthweight)) - (0.008 * (PaO2 in mm Hg)) + (3.744 * (pH)) - (1.747 if congenital anomaly present) - (1.227 if intubated time of call) - 25.53
where:
• The values in the formula on page e426 differ from the coefficients in Table 3. The coefficient for birthweight in the formula is 0.000207 vs 0.002 in the table. The coefficient for PaO2 is -0.00088 vs -0.008.
probability of death =
= 1 / (1 + EXP((-1) * X))
|
Parameter |
Finding |
Points |
|
pH |
> 7.1 |
0 |
|
|
6.91 - 7.1 |
4 |
|
|
<= 6.9 |
10 |
|
age in hours |
> 1 hour |
0 |
|
|
0 to 1 hour |
4 |
|
Apgar score at 1 minute |
> 3 |
0 |
|
|
3 |
2 |
|
|
2 |
2 |
|
|
1 |
5 |
|
|
0 |
8 |
|
birthweight in grams |
> 1,500 grams |
0 |
|
|
1,001 - 1,500 |
1 |
|
|
751 - 1,000 |
2 |
|
|
<= 750 |
5 |
|
PaO2 |
> 3 kPa (> 22.56 mm Hg) |
0 |
|
|
<= 3 kPa |
2 |
|
congenital abnormality |
absent |
0 |
|
|
present |
5 |
|
intubated |
absent |
0 |
|
|
present |
6 |
total score =
= SUM(points for all 7 parameters)
Interpretation:
• minimum score: 0
• maximum score: 40
• The higher the score the greater the mortality rate.
|
Score |
Mortality Rate |
|
0 |
4% |
|
1 to 3 |
11% |
|
4 to 6 |
12% |
|
7 to 10 |
25% |
|
11 to 14 |
33% |
|
15 to 19 |
48% |
|
>= 20 |
80% |
from Figure 1, page e427
Performance:
• The formula had an area under the ROC curve of 0.82.
Specialty: Critical Care, Emergency Medicine
ICD-10: ,
