Stage

Cumulative lethality

Case fatality rate

(%)

p

FU*

Rates (CI 95%)

p

I

10/687 (1.46)

X²: 811.83 p: 0.000

19.016.63

0.53 (0.28 - 0.98)

X²: 980.29

p: 0.000

IIA

26/845 (3.08)

22.796.56

1.14 (0.78 - 1.68)

IIB

39/568 (6.87)

15.168.40

2.57 (1.89 - 3.52)

IIIA

43/433 (9.93)

12.178.86

3.5 (2.62 - 4.76)

IIIB

58/224 (25.89)

5.230.94

11.09 (8.57 - 14.34)

IIIC

11/52 (21.15)

1.350.14

8.15 (4.51 - 14.71)

IV

21/54 (38.89)

1.099.49

19.10 (12.45 - 29.29)

Unknown

170/297 (57.24)

5.876.23

28.93 (24.89 - 33.62)