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Table 1 Baseline characteristics for the developmental data set and for subsets with and without prevalent myocardial infarction at baseline, ARICLAD, 1987–89

From: Common carotid artery wall thickness and external diameter as predictors of prevalent and incident cardiac events in a large population study

  

Baseline Myocardial Infarction

 

Developmental Sample

Absent

Present

 

N = 7125

N = 6836

N = 289

Age in years

54.2 ± 5.7

54.1 ± 5.7

56.9 ± 5.1***

Gender (% male)

45.1

43.8

76.1***

Race (% nonwhite)

25.9

25.9

23.9

Diabetes (%)

9.8

9.2

23.2***

Hypertension (%)

33.0

32.2

52.6***

Height in cm

168.5 ±9.3

168.4 ± 9.3

172.1 ± 8.0***

BMI (kg/m2)

27.2 ± 5.0

27.1 ± 5.0

27.9 ± 5.2**

LDL-C (mmol/L)

3.55 ±1.02

3.54 ± 1.02

3.78 ± 1.03***

HDL-C (mmol/L)

1.36 ± 0.45

1.37 ± 0.45

1.11 ± 0.38***

Cholesterol Med. (% use)

2.6

2.5

5.2**

Fasting glucose (mg%)†

106.7 ± 36.2

106.2 ± 35.6

117.3 ± 46.5***

White blood count (1000s/ml)

6.10 ± 1.94

6.08 ± 1.93

6.74 ± 1.99***

Fibrinogen (mg/dl)‡

302.4 ± 65.2

301.4 ± 64.8

327.2 ± 70.8***

Current drinker (%)

57.2

57.5

49.1**

Current smoker (%)

27.2

27.0

32.5*

Systolic BP (mm Hg)

121.0 ± 18.7

120.9 ± 18.6

121.7 ± 21.1

Diastolic BP (mm Hg)

73.4 ± 11.3

73.5 ± 11.2

72.1 ± 12.2

RCCA IMT in mm

0.66 ± 0.18

0.66 ± 0.17

0.74 ± 0.25***

RCCA diameter in mm

7.78 ± 0.95

7.76 ± 0.94

8.32 ± 1.08***

RCCA wall area in mm2

14.97 ± 4.94

14.85 ± 4.81

17.83 ± 6.73***

  1. Values are expressed as percent or as means ± standard deviation
  2. ARICLAD: Atherosclerosis Risk in Communities Limited Access Data
  3. BMI: body mass index= weight in kg/height in meters2
  4. BP: blood pressure
  5. HDL- and LDL-cholesterol: high and low density lipoprotein cholesterol
  6. IMT: intima medial thickness
  7. RCCA: right common carotid artery
  8. † Conversion factor = 0.0555 to convert to mmol/L
  9. ‡Conversion factor = 0.0294 to convert to μmol/L
  10. *p-values = 0.05 **p-value = 0.005 ***p-value = 0.0005 for chi-square and Wilcoxon two-sample test for difference in the characteristic by baseline myocardial infarction status
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Cardiovascular Ultrasound

ISSN: 1476-7120

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