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Table 1 Participant characteristics in REGARDS study data by CHD risk category*

From: Claims-based algorithms for identifying Medicare beneficiaries at high estimated risk for coronary heart disease events: a cross-sectional study

Characteristic† Overall High risk for CHD events Not high risk for CHD events
  N = 6,615 N = 3,216 N = 3,399
Age, y 73.2 (5.6) 73.9 (5.6) 72.7 (5.5)
Male 49.6 60.0 39.7
Black 30.4 32.9 28.1
Income < $35,000/y 56.7 58.7 54.6
Education ≤ High school graduate 40.6 45.4 36.2
Current use of statins 37.6 49.2 26.6
Total cholesterol, mg/dL 187.0 (38.9) 177.8 (38.5) 195.6 (37.3)
LDL cholesterol, mg/dL 109.8 (34.0) 103.4 (33.8) 115.9 (33.1)
LDL cholesterol among statin non-users, mg/dL 120.4 (33.9) 117.3 (35.4) 122.5 (32.8)
HDL cholesterol, mg/dL 52.1 (16.4) 47.6 (15.1) 56.3 (16.5)
Triglycerides, mg/dL 125.3 (61.5) 133.9 (66.0) 117.1 (55.8)
Family history of MI 19.0 20.9 17.4
Current cigarette smoking 8.9 11.0 6.9
Body mass index, kg/m2 28.1 (5.4) 28.9 (5.4) 27.4 (5.2)
Systolic blood pressure, mm Hg 130.3 (16.6) 133.2 (17.5) 127.5 (15.1)
Diastolic blood pressure, mm Hg 75.3 (9.4) 75.6 (9.8) 75.1 (8.9)
Blood glucose, mg/dL 101.4 (27.9) 110.7 (36.3) 92.7 (10.5)
C-reactive protein, mg/L 4.5 (8.5) 5.0 (9.4) 4.0 (7.5)
Hypertension 64.7 75.2 54.8
Metabolic syndrome 39.0 54.4 24.5
Coronary heart disease 24.6 50.6 0.0‡
Acute MI in prior year 1.3 2.8 0.0‡
Peripheral arterial disease 2.6 5.3 0.0‡
Abdominal aortic aneurysm 1.6 3.3 0.0‡
Carotid artery disease 3.2 6.7 0.0‡
Stroke 7.6 15.7 0.0‡
Diabetes 20.8 42.8 0.0‡
  1. Abbreviations: HDL high density lipoprotein, LDL low density lipoprotein MI myocardial infarction.
  2. *REGARDS participants included in this table are those who were linked to Medicare data and met all eligibility criteria for this analysis (see Figure 1).
  3. †Numbers are column percentages or means (standard deviations). Income was missing for 914 participants, education for 4, body mass index for 16, and C-reactive protein for 164.
  4. ‡By definition, participants not at high risk for CHD events did not have a history of CHD or risk equivalents according to REGARDS study data.