Table 1. Demographic features and clinical characteristics.

Characteristic	n (%)
Total number of patients	19
Gender, male	9 (47.4)
Age, year, mean±SD	47.5±11.8 (21-70)
Atopy, presence	7/15 (46.7)
Past history of allergic diseases	8 (42.1)
Symptoms at the time of prior exposure	12 (63.2)
None	7 (36.8)
Non-anaphylaxis allergic reactions	3 (15.8)
Anaphylaxis	9 (47.4)
Severity of anaphylaxis*
Severe	5 (26.3)
Moderate	14 (73.7)
Latency period, minute, mean±SD	18.4±12.1 (10-50)

Values are given as number (%), unless otherwise indicated.

^*The severity of anaphylaxis was graded as mild, moderate, or severe, using a previously established grading system. Mild reactions were defined by presentation of only cutaneous symptoms. Moderate symptoms were exhibited when respiratory, cardiovascular, or gastrointestinal involvement was apparent; whereas hypotension, hypoxia, loss of consciousness, or confusion was considered to reflect severe anaphylaxis (reference ⁷).