Table 3 Vit. D level change (difference Vit. D-w1–Vit. D-w4) during illness and IgG level change 3 months PSO (difference IgG-w4–IgG-m4).

Frequency N (%)

Increase

17 (34.0)

11 (64.7)

Decrease

33 (66.0)

7 (35.3)

Sex N (mean rank)

U = 266, p = 0.372

U = 30, p = 0.763

F

26 (23.73)

11 (9.27)

M

24 (27.42)

6 (8.50)

Age N (mean rank)

H(5) = 6.027, p = 0.304

H(4) = 4.036, p = 0.401

0–29

5 (25.9)

4 (8.50)

30–39

3 (20.67)

3 (10.00)

40–49

4 (41.88)

3 (8.67)

50–59

10 (21.95)

3 (4.67)

60–69

14 (24.89)

4 (12.25)

70+

14 (24.86)

Disease severity N (mean rank)

H(3) = 0.542, p = 0.910

H(2) = 6.489, p = 0.039

Mild

8 (25.31)

8 (6.63)

Moderate

18 (24.00)

6 (9.00)

Severe

22 (26.30)

3 (15.33)

Critical

2 (31.00)

Hospitalisation N (mean rank)

U = 194.5, p = 0.309

U = 2, p = 0.017

No

13 (21.96)

14 (7.64)

Yes

37 (26.74)

3 (15.33)

Difference between medians N (mean rank)

Z = − 2.129, p = 0.033

Z = − 2.107, p = 0.035

Negative Ranks

33 (26.00)

11 (11.0)

Positive Ranks

17 (24.53)

6 (5.33)