WHO Grades

Time (weeks)

P value

Total No.

1 N (%)

2 N (%)

3 N (%)

4 N (%)

Grade 0

19(63.3)

6(20.0)

2(6.9)

9(33.3)

0.000

26

Grade 1

10(33.3)

10(33.3)

9(31.0)

12(44.4)

41

Grade 2

1(3.3)

9(30.0)

11(37.9)

5(18.5)

26

Grade 3

0(0.0)

4(13.3)

7(24.1)

1(3.7)

12

Grade 4

0(0.0)

1(3.3)

0(0.0)

0(0.0)

1

Total (%)

100

100

100

100

No.

27

29

30

30

116