Table 4:

Challenge Fail Rates by Almond SPT (A), Almond-specific IgE (B), and Age (C)

A
SPT Size	n (%)	Failed challenge	Grade 2/3 Reaction	Anaphylactic Reaction
0–2 mm	203 (34%)	3%	0.5%	0%
3–4 mm	122 (21%)	3%	2%	0%
5–6 mm	124 (21%)	7%	6%	1%
7–8 mm	60 (10%)	10%	5%	2%
>8 mm	61 (10%)	10%	10%	2%
B
Specific IgE	n (%)	Failed challenge	Grade 2/3 Reaction	Anaphylactic Reaction
<0.35	195 (33%)	3%	0.5%	0%
0.35 – 1.00	109 (18%)	3%	3%	0%
1.01 – 2.00	86 (15%)	12%	9%	1%
2.01 – 10.00	136 (23%)	3%	2%	0%
> 10.00	44 (7%)	17%	14%	5%
C
Age at Challenge (years)	n (%)	Failed challenge	Grade 2/3 Reaction	Anaphylactic Reaction
0–4	146 (25%)	7%	6%	0%
5–9	203 (34%)	6%	4%	1%
10–17	180 (31%)	4%	2%	0%
18+	61 (10%)	2%	0%	0%