Characteristics of participants
| ID | Group* | Recruitment source | Sex | Allergic diagnoses | Self-reported allergens† | Test history‡ |
| 01 | A | Paediatric allergy clinic | M | Anaphylaxis from age 5 | Latex, nuts, egg, prawn | SPT & RAST |
| 02 | B | Paediatric allergy clinic | M | Allergic vomiting as infant, urticaria, asthma; at risk of anaphylaxis | Wheat, egg, nuts, peas, lentils, banana, kiwi, fish, cat hair, dust mite | SPT & RAST |
| 03 | B | Paediatric allergy clinic | M | Anaphylaxis before 1st birthday preceded by eczema and allergic vomiting when weaning | Milk, egg, wheat, gluten | SPT & RAST, alternative testing |
| 04 | B | Paediatric allergy clinic | M | Anaphylaxis before 1st birthday preceded by allergic vomiting when weaning, | Dairy, egg, wheat, sesame seeds, most nuts | SPT & RAST |
| 05 | D | GP | M | Photodermatitis, no history of atopy or anaphylaxis | Skin | Uncertain |
| 06 | A | Paediatric allergy clinic | M | Anaphylaxis at age 2 | Nut | SPT & RAST awaiting nut challenge |
| 08 | D | GP | F | Marked local reaction to bee stings, no anaphylaxis | Bee stings | None |
| 09 | D | GP | F | Chronic idiopathic urticaria, no anaphylaxis | Urticaria, hay fever | None |
| 10 | D | GP | F | Asthma, urticaria, no anaphylaxis (but grandson with anaphylaxis) | Pollen, dogs, cats, hay, grass, sprays, dust, soaps | None |
| 12 | D | GP | F | Rhinitis, no anaphylaxis | House dust mite, straw, dogs and cats | SPT |
| 13 | C | Anaphylaxis Campaign | F | Anaphylaxis. Other conditions include asthma and hay fever | Nuts | SPT & RAST |
| 14 | A | Anaphylaxis Campaign | M | Anaphylaxis to peanuts, cold-induced urticaria | Peanut, cold climate | SPT & RAST |
| 16 | C | GP | F | Anaphylaxis onset young adult | Pollens, shellfish and kiwi | None |
| 17 | C | GP | F | Anaphylaxis from age 7 | All nuts and nut products | None |
| 21 | D | GP | F | Asthma, eczema, no anaphylaxis | Multiple food, pollen, etc | Patch & Vega |
| 22 | C | GP | M | Anaphylaxis to wasp sting aged 40 | Grass pollen, wasp venom | SPT & RAST |
| 23 | C | GP | F | Anaphylaxis at age 19 | Dry roasted peanut, Californian wine | SPT |
| 25 | B | Paediatric allergy clinic | F | Anaphylaxis as toddler, preceded by bad eczema when weaning | Nuts, egg | RAST |
| 28 | C | Snowballing | M | Anaphylaxis | Nuts | Patch |
| 29 | D | Snowballing | F | Oral allergy syndrome | Walnut, dried date, apricot | None |
↵* A, children with anaphylaxis occurring ‘out of the blue’; B, children in whom the recognition of severe allergy was perceived as delayed; C, adults with anaphylaxis who adapted; D, adults in search of an answer.
↵† Patient's self-report of nuts commonly included peanuts (strictly legumes); we did not attempt to differentiate these from true nuts.
↵‡ Patch, skin patch testing; RAST, radioallergosorbent testing for IgE in blood; SPT, skin prick test; Vega, VegaTest, a form of electrodermal testing.