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Table 2 Demographic, clinical, and Immunologic characteristics of patients with AGS

From: Alpha-gal allergy in a South Asian country

 

All

Children

≤ 18 years

Adults

Comparison (p value children vs. adults)

Number (percentage)

57 (100)

38 (66.7)

19(33.3)

 

Age in years median (range)

12 (2.25–61)

8 (2.25–18)

28 (20–61)

 

Male sex (%)

26(45.6)

19 (50)

7(36.8)

0.41 †

Symptoms

 Hives alone (%)

16(28.1)

11(28.9)

5 (26.3)

>0.99 †

 Anaphylaxis (%)

39 (68.4)

26 (68.4)

13 (68.4)

>0.99 †

 + GIT (%)

21(36.8)

13 (34.2)

8 (42.1)

>0.58†

 GIT alone (%)

1 (1.8)

1 (2.6)

0 (0)

 

 Abdominal pain (%)

13 (22.8)

8 (21.1)

5 (26.3)

>0.74 †

Respiratory (%)

29 (50.8)

19 (50)

10 (52.6)

>0.99 †

Grade 5 anaphylaxis (%)

17 (29.8)

11 (28.9)

6 (31.6)

>0.99 †

Timing

 0-<1 hour (%)

14 (24.5)

10 (26.3)

4 (22.2)

>0.76 †

 >1-≤2 hours (%)

10 (18.2)

6 (16.2)

4 (22.2)

0.71†

 ≤ 2 hours (%)

24 (43.6)

16 (43.2)

8 (44.4)

>0.99 †

 >2 hours (%)

31 (56.4)

21 (56.8)

10 (55.6)

>0.99 †

Uncertain (%)

2 (3.5)

1(2.6)

1 (5.3)

 

Atopy/Out of 50 (%)

18/50 (36)

11/33 (33.3)

7/17 (41.2)

>0.76 †

Tick bite/Out of (%)

23/47 (48.9)

18/32 (56.2)

5/15 (33.3)

0.21 †

IgE to Alpha-gal > 0.35 IU/mL (%)

57 (100)

38 (100)

19 (100)

 

IgE to alpha-gal IU/mL GM (range)

18.36 (0.95–87.1)

22.3 (0.95–87.1)

12.99(1.24–38.8)

0.064 ††

IgE to beef/pork/mutton* > 0.35 IU/mL/Out of (%)

54/54 (100)

35/35(100)

19/19 (100)

 

IgE to beef/pork/mutton IU/mL GM (range)

7.16 (0.36–53.1)

8.73(0.36–53.1)

4.98(0.37–22.7)

0.12 ††

IgE to BSA > 0.35 IU/mL **/Out of (%)

1/52 (1.9)

1/33 (3.0)

0/19 (0)

 

IgE to alpha-gal>IgE to beef/pork #/Out of (%) 

53/54 (98.1)

35/35 (100)

18/19 (94.7)

 
  1. * Of the 3/57 patients where IgE to beef/pork was not done, in two, skin prick testing (SPT) for beef was done and were negative. In the third, IgE to BSA was negative. In all three IgE to alpha-gal was positive. Two gave a history of tick bites. The other was exposed to ticks, but did not give a history of bites
  2. **One patient had a positive IgE to BSA, but IgE to red meat < alpha-gal, and there was delayed allergy to red meat. IgE to BSA was not done in 5 patients. In all 5, IgE to alpha-gal was positive. In two patients, skin prick testing to beef was negative. In the other three, IgE to alpha-gal > IgE to beef and they had delayed reactions to red meat
  3. # In one patient IgE to red meat > alpha gal, IgE to BSA < 0.1, interval to reaction was 2 ½ hours
  4. † Fisher’s exact test
  5. †† Mann-Whitney U test