Type 10^*

Type 8^*

Type 6^*

Real situation^**

20 s

M

10

8

6

F

3

2.4

1.8

30 s

M

10

8

6

F

3

2.4

1.8

40 s

M

5

4

3

F

1.5

1.2

0.9

50 s

M

2.5

2

1.5

F

0.75

0.6

0.45

60 s

0

0

0

Number of night duties per physician per month

5.08 (An assumed value)

4.07 (An assumed value)

3.05 (An assumed value)

3.48 (An averaged value)