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Table 1 Documentation of allergy in the CPCSSN allergy table

From: Use of electronic medical records to describe the prevalence of allergic diseases in Canada

Allergy category

Number of observations

Number of patients

No known allergy

227,070 (34.6%)

227,050 (42.4%)

Drug

237,173 (36.1%)

209,028 (39.0%)

Beta-lactam

77,410 (11.8%)

77,353 (14.4%)

Environment

72,414 (11.0%)

62,164 (11.6%)

No known drug allergy

59,645 (9.1%)

53,196 (9.9%)

Food

52,777 (8.0%)

48,822 (9.1%)

Stinging insect

27,797 (4.2%)

26,397 (4.9%)

Other

14,445 (2.2%)

14,025 (2.6%)

Vaccine

495 (0.1%)

495 (0.1%)

No known food allergy

5 (0.0%)

5 (0.0%)

Total

656,834

536,005