Table 5: Observed mortality compared

with predicted values of the RACHS-1 scale.

Risk

Patients,

n

Deaths,

n

Expected

mortality,

%

Obtained

mortality,

%

p

1

83

1

0.4-2.5

1.2

NS

2

16

1

3.8-8.6

6.3

NS

3

6

0

18.4-22.4

0

NS

4

4

3

29.4-34.2

75

0.005

5

0

0

36.4-42.4

SD

6

0

0

48.2-54.0

SD

NC

5

4

?

80

?

108 classifiable and 5 not classifiable.

NC = not classifiable.

NS = not significant.

SD = standard deviation.

RACHS-1 = Risk Adjustment in Congenital Heart Surgery -1.