Table 2 Characteristics of the population of patients receiving VE or VC VIT between 1990 and 2016. Mean, minimum and maximum values are reported along with the levels of significance for the Student’s (t), Mann-Whitney (MW) and chi-square (X²) tests. The significant differences are in bold

Age mean (range)

49.9 (10–78)

43.7 (15–74)

MW, P < 0.014

M/F

166/54

66/17

X², P = 0.544

Grade before VIT n (%)

X², P _Exact  = 0.134

Mueller 1

13 (6%)

0 (0%)

Mueller 2

30 (14%)

11 (14%)

Mueller 3

64 (29%)

29 (34%)

Mueller 4

111 (51%)

43 (52%)

VC Intradermal test (thereshold in mcg/ml)^a

X², P = 0.003

1 mcg/ml

45 (20%)

26 (31%)

0,1 mcg/ml

70 (32%)

34 (41%)

0,01 mcg/ml

60 (27%)

20 (24%)

0,001 mcg/ml

21 (10%)

3 (4%)

0,0001 mcg/ml

24 (11%)

VC specific IgE mean (range) kU/L

2.1 (0.3–73.8)

3.0 (0.2–32.9)

t, P > 0.05

Tryptase, mean (range)

5.5 (1–40)

5.2 (1.3–39.1)

t, P > 0.05