From over 7.3 million individuals, the absolute-prevalence of
reported drug allergy in Hong Kong was 5.61%
Anonymised data was collected from the electronic health records of
7,337,778 unique individuals. Among them, 411,885 had at least one
physician-reported drug allergy in 2021. The near-absolute prevalence of
physician-reported drug allergy in Hong Kong was therefore 5.61%. A
total of 552,897 drug allergy labels were shared amongst the 441,885
unique individuals; 346,969 (62.8%) of the reported drug allergy were
found among female individuals. Among individuals with reported drug
allergy, 28,467 (6.91%) had more than 2 concomitant reported drug
allergies.