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Table 1 Basal characteristics of the study subjects according to groups of changes in smoking habit

From: Association of smoking cessation after atrial fibrillation diagnosis on the risk of cardiovascular disease: a cohort study of South Korean men

 Continual smokersQuittersSustained ex-smokersNever smokers
Number of people475251779867
Age, years, mean (SD)59.9 (9.4)60.7 (9.6)62.9 (9.9)64.1 (9.6)
Household income, quartiles, N (%)
 1st (highest)160 (33.7)101 (40.2)365 (46.9)377 (43.5)
 2nd155 (32.6)65 (25.9)197 (25.3)238 (27.5)
 3rd94 (19.8)55 (21.9)133 (17.1)145 (16.7)
 4th (lowest)66 (13.9)30 (12.0)84 (10.8)107 (12.3)
Alcohol consumption, times per week, N (%)
 0146 (30.7)136 (54.2)356 (45.7)513 (59.2)
 0–191 (19.2)42 (16.7)141 (18.1)143 (16.5)
 1–2116 (24.4)43 (17.1)122 (15.7)116 (13.4)
 3–460 (12.6)21 (8.4)95 (12.2)62 (26.1)
  ≥ 562 (13.1)9 (3.6)65 (8.3)33 (3.8)
Physical exercise, times per week, N (%)
 0227 (47.8)133 (53.0)340 (43.7)407 (46.9)
 1–2145 (30.5)53 (21.1)219 (28.1)206 (23.8)
 3–456 (11.8)30 (12.0)121 (15.5)117 (13.5)
 5–618 (3.8)13 (5.2)56 (7.2)54 (6.2)
 729 (6.1)22 (8.8)43 (5.5)83 (9.6)
Body mass index, kg/m2, mean (SD)23.8 (3.0)23.9 (3.1)24.4 (2.9)24.2 (2.8)
Systolic blood pressure, mmHg, mean (SD)125.1 (16.5)124.5 (16.1)125.8 (15.7)126.6 (15.6)
Fasting serum glucose, mg/dL, mean (SD)104.0 (32.3)103.1 (27.5)104.8 (28.2)102.8 (27.5)
Total cholesterol, mg/dL, mean (SD)188.7 (36.1)192.2 (38.1)185.6 (35.2)182.3 (35.8)
Charlson comorbidity index, N (%) 
  ≤ 1185 (39.0)84 (33.5)281 (36.1)333 (38.4)
 2106 (22.3)49 (19.5)163 (20.9)172 (19.8)
 380 (14.7)37 (14.7)128 (16.4)151 (17.4)
  ≥ 4114 (24.0)81 (32.3)207 (26.6)211 (24.3)
Aspirin use, N (%)277 (58.3)151 (60.2)501 (64.3)558 (64.4)
Warfarin use, N (%)79 (16.6)58 (23.1)183 (23.5)232 (26.8)
  1. Acronyms: SD standard deviation
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