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Table 1 General characteristics of participants by baseline age groups

From: A longitudinal analysis of the progression from normal blood pressure to stage 2 hypertension: A 12-year Korean cohort

Variable Age
40-49 years (n=17,093) 50-59 years (n=25,373) 60–79 years (n=1542) P for Trenda
Age (years) 44.6±2.3 51.7±2.0 66.1±3.5 < 0.01
Sex
 Male 7111 (45.8) 1776 (44.4) 803 (48.9) 0.29
 Female 8416 (55.2) 2227 (55.6) 839 (51.1)  
Systolic BP (mm Hg) 106.3±7.2 106.6±7.1 107.1±7.2 < 0.01
Diastolic BP (mm Hg) 66.6±5.9 67.2±5.9 66.6±6.1 < 0.01
Body mass index (kg/m2) 22.8±2.5 23.1±2.5 22.7±2.8 < 0.01
Fasting glucose (mg/dl) 90.4±24.0 91.5±18.8 93.7±25.2 < 0.01
Pulse pressure (mm Hg) 39.7±6.3 39.7±6.3 40.5±6.8 < 0.01
Total cholesterol (mg/dl) 188.7±33.7 198.0±35.6 197.3±36.0 < 0.01
Aspartate aminotransferase (U/L) 23.0±15.8 24.4±12.7 26.2±17.7 < 0.01
Alanine aminotransferase (U/L) 21.6±19.2 22.9±22.0 21.4±11.7 < 0.01
Gamma GTP (U/L) 25.1±27.6 26.6±26.8 24.7±31.7 < 0.01
Hemoglobin (g/dl) 13.6±1.6 13.6±1.4 13.5±1.4 < 0.01
Smoking status
 No 11,880 (79.1) 3121 (81.1) 1312 (82.8) <  0.01
 Current 3138 (20.9) 725 (18.9) 272 (17.2)  
Drinking frequency
 1–2/week 14,423 (94.2) 3657 (93.2) 1431 (89.4) <  0.01
 3–5/week 882 (5.8) 268 (6.8) 169 (10.6)  
Exercise frequency     0.19
 not at all 12,160 (79.9) 3103 (79.3) 1315 (82.2)  
 3–5/ week 3059 (20.1) 808 (20.7) 285 (17.8)  
History of diabetes     <  0.01
 No 15,358 (98.9) 3921 (98.0) 1578 (96.1)  
 Yes 169 (1.1) 82 (2.1) 64 (3.9)  
Family history of hypertension     <  0.01
 No 13,106 (93.0) 3406 (93.7) 1406 (96.6)  
 Yes 979 (7.0) 231 (6.3) 50 (3.4)  
Family history of diabetes     <  0.01
 No 12,945 (91.8) 3368 (92.6) 1405 (96.5)  
 Yes 1158 (8.2) 268 (7.4) 51 (3.5)  
  1. Values are expressed as mean ± SD (standard deviation) or number (percentage)
  2. aP for trend: Cochran-Armitage test for categorical variables and ANOVAs for continuous variables