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Table 1 Characteristics of the participants

From: Trajectories of cardiovascular disease risk and their association with the incidence of cardiovascular events over 18 years of follow-up: The Tehran Lipid and Glucose study

Characteristics* Original Sample†
(n = 3699)
Prospective sub-Sample‡
(n = 2522)
P⁑
Age, y 53.2 ± 9.3 61.6 ± 8.7  < .0001
Male, n (%) 1588 (42.9) 1036 (41.1) 1.000
Body mass index, kg/m2 28.0 ± 4.5 29.1 ± 4.9  < .0001
Total cholesterol, mg/dL 225.1 ± 46.8 204.4 ± 42.1  < .0001
LDL cholesterol, mg/dL 144.7 ± 38.7 123.9 ± 35.2  < .0001
HDL cholesterol, mg/dL 42.2 ± 10.9 47.9 ± 11.2  < .0001
Triglycerides, mg/dL, median (IQR)* 169 (119–237) 143 (105–196)  < .0001
Lipid-lowering medication, n (%) 199 (5.4) 329 (13.1)  < .0001
Systolic blood pressure, mm Hg 126.7 ± 20.6 127.2 ± 20.3  < .0001
Diastolic blood pressure, mm Hg 80.7 ± 11.2 79.7 ± 11.3 0.0203
Hypertension, n (%) 1262 (34.1) 1079 (43.1)  < .0001
Anti-hypertensive medication, n (%) 434 (11.7) 587 (23.5)  < .0001
Diabetes mellitus, n (%) 488 (13.2) 530 (21.2)  < .0001
Anti-diabetic medication, n (%) 232 (6.3) 341 (13.6)  < .0001
Current smoking, n (%) 464 (12.5) 225 (9.0)  < .0001
  1. HDL indicates high-density lipoprotein; LDL, low-density lipoprotein
  2. *Numbers represent mean ± SD for continuous variables except for Triglycerides that represent the median (IQR); numbers and percentages are corresponding to "Yes" for dichotomous variables
  3. Characteristics for the trajectory sample were measured at the baseline (the first examination cycle)
  4. Characteristics for the prospective sample were measured at the fourth examination cycle (2005–2008)
  5. Paired T-test for continuous variables and McNemar test for categorical variables