Prevalence, risk factors and comorbidities of allergic rhinitis in South Korea: The Fifth Korea National Health and Nutrition Examination Survey.
BACKGROUND
There has been no nationwide epidemiological investigation of allergic rhinitis (AR) that was diagnosed by both questionnaires and laboratory tests in Korea. This study investigated the prevalence, risk factors, and comorbidities of AR in South Korea.


METHODS
The Korean National Health and Nutritional Examination Survey examined a representative sample of the Korean population. A total of 2305 participants underwent immunoradiometric assay for specific IgE antibodies against common indoor allergens. Healthy, atopy only, and AR groups were defined according to the results of allergen test. The weighted prevalence for each group was calculated. Risk factors including food and comorbidities were identified using univariate or multivariate analyses. The patients were also categorized into four subgroups according to the Allergic Rhinitis and Its Impact on Asthma (ARIA) classification and associated comorbidities were analyzed.


RESULTS
The prevalence of atopy only and AR was 30.0 ± 1.2% and 16.2 ± 1.0%, respectively. The multivariate analysis showed that the prevalence was influenced by sex (p < 0.01) for atopy only and sex (p = 0.09), age (p = 0.02), marital status (p = 0.24), and stress level (p = 0.30) for AR. Compared with the healthy group, asthma (odds ratio [OR] = 4.77), nasal polyp (NP; OR = 3.44), chronic rhinosinusitis (OR = 13.93), and olfactory dysfunction (OR = 4.88) were more prevalent in the AR group. Based on the ARIA guideline, intermittent mild rhinitis was most common (58.1%). Asthma was correlated to severity and atopic dermatitis and NPs was associated with persistency. Daily intake of less mackerel and more carrots, bread, and bean curd were associated with the increased risk of AR.


CONCLUSIONS
Prevalence, risk factors, and comorbidities of AR were evaluated in the general Korean population, which will contribute to prevention and treatment of AR and its comorbidities in Koreans.
Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, South Korea.
Chae-Seo
CS
Rhee
Jee Hye
JH
Wee
Jae-Cheul
JC
Ahn
Woo Hyun
WH
Lee
Keng Lu
KL
Tan
Soyeon
S
Ahn
Ju Hyun
JH
Lee
Chul-Hee
CH
Lee
Yang-Sun
YS
Cho
Kyoung Ho
KH
Park
Kun Hee
KH
Lee
Kyung-Su
KS
Kim
Ari
A
Lee
Jeong-Whun
JW
Kim
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000485:Allergens / Q000009:adverse effects / Q000032:analysis / Q000276:immunology; D002648:Child; D015897:Comorbidity; D004032:Diet; D005260:Female; D005502:Food / Q000009:adverse effects; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood; D007723:Korea; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys / Q000706:statistics & numerical data*; D015995:Prevalence; D065631:Rhinitis, Allergic / Q000453:epidemiology*; D012307:Risk Factors; D012737:Sex Factors; D012959:Socioeconomic Factors; D013315:Stress, Psychological / Q000453:epidemiology*; D011795:Surveys and Questionnaires; D055815:Young Adult
D000485:Allergens; D007073:Immunoglobulin E