Exacerbations severity

Group A

Group B

Test value*

P-value

No.

%

No.

%

Before vitamin D supplementation

Absent

0

0.0%

0

0.0%

2.613

0.271

Mild

3

15.0%

4

20.0%

Moderate

11

55.0%

6

30.0%

Severe

6

30.0%

10

50.0%

After vitamin D supplementation

Absent

2

10.0%

3

15.0%

1.682

0.641

Mild

13

65.0%

10

50.0%

Moderate

5

25.0%

6

30.0%

Severe

0

0.0%

1

5.0%

Test value

16.500

12.935

P-value

0.001

0.005