Table 2.

Prevalence of risk factors for stroke

Prevalence (%)	General population*	Stroke population†
Smoking‡
Overall	24.2	23.7
Male	43.1	37.7
Female	5.7	4.6
High-risk alcohol intake§
Overall	13.5	25.2
Male	20.7	39.2
Female	6.6	5.1
Obesity
Overall	4.5	4.0
Male	5.0	3.6
Female	3.8	4.6
Hypertension
Overall	20.5	67.1
Male	24.1	64.4
Female	16.7	70.8
Diabetes mellitus
Overall	8.0	32.4
Male	9.7	32.5
Female	6.5	32.2
Hypercholesterolemia∥
Overall	7.8	7.2
Male	7.4	6.0
Female	8.3	8.8
Atrial fibrillation
Overall	1.9	21.0
Male	2.0	18.3
Female	1.9	24.7

^*Standardization was made based on the 2005 Population and Housing Census of Korea. Prevalence of each risk factor in the general population was evaluated using the Korea National Health and Nutrition Examination Survey (KNHANES) database in 2014, except for hypercholesterolemia, which was evaluated using the KNHANES database from 2010 to 2014, and atrial fibrillation, which was evaluated using the National Health Insurance Service-National Sample Cohort database in 2013. Prevalence of risk factors in the general population was analyzed in adults ≥19 years of age, except for atrial fibrillation in adults ≥20 years of age due to a different source database;

^†Standardization was made using the age and sex structure of the Clinical Research Collaboration for Stroke in Korea (CRCSK) database in 2014 and 2015. Prevalence of each risk factor in the stroke population was evaluated using the CRCS-K database in 2014, except for high-risk alcohol intake from January 2011 to February 2013, and hypercholesterolemia and atrial fibrillation from January 2010 to March 2015. Prevalence of risk factors in the stroke population was analyzed in all age groups;

^‡Smoking was defined as a current smoker with a lifetime history of smoking with 100 or more cigarettes;

^§High-risk alcohol intake was defined as drinking with average alcohol consumption above 7 glasses in men (5 glasses in women) and twice or more a week;

^∥Hypercholesterolemia was defined as total cholesterol ≥240 mg/dL.