Table 1.
General characteristics of the study population, by cohort.
| Tromsø | MDCS | CAPS | CHS | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of participants | 6659 | 6103 | 5056 | 5888 | 23706 | |||||
| Age (years) | 60.2 | ± 10.2 | 57.5 | ± 5.9 | 50.1 | ± 13.1 | 72.8§ | ± 5.6 | 60.5 | ± 12.1 |
| Male sex | 3298 | (49.5%) | 2572 | (42.1%) | 2471 | (48.9%) | 2495 | (42.4%) | 10836 | (45.7%) |
| History of vascular disease | 954 | (14.3%) | 167 | (2.7%) | 155 | (3.1%) | 2213 | (37.6%) | 3489 | (14.7%) |
| Coronary heart disease | 825 | (12.4%) | 102 | (1.7%) | 108 | (2.1%) | 1997 | (33.9%) | 3032 | (12.8%) |
| Stroke | 182 | (2.7%) | 69 | (1.1%) | 52 | (1.0%) | 349 | (5.9%) | 652 | (2.8%) |
| Body mass index (kg/m2) | 26.1 | ± 4.0 | 25.9 | ± 4.0 | 26.6 | ± 4.1 | 26.7 | ± 4.7 | 26.3 | ± 4.2 |
| Waist-hip ratio | 0.87 | ± 0.08 | 0.85 | ± 0.09 | 0.95 | ± 0.11 | 0.93 | ± 0.09 | 0.90 | ± 0.10 |
| Hypertension* | 4006 | (60.2%) | 3891 | (63.8%) | 1320 | (26.1%) | 3681 | (62.5%) | 12898 | (54.4%) |
| Systolic blood pressure (mmHg) | 145 | ± 23 | 141 | ± 19 | 128 | ± 17 | 137 | ± 22 | 138 | ± 21 |
| Diastolic blood pressure (mmHg) | 83 | ± 13 | 87 | ± 9 | 77 | ± 10 | 71 | ± 11 | 80 | ± 13 |
| Diabetes mellitus† | 217 | (3.3%) | 277 | (4.5%) | 134 | (2.7%) | 722 | (12.3%) | 1350 | (5.7%) |
| Current smoking | 2118 | (31.8%) | 1724 | (28.2%) | 1057 | (20.9%) | 700 | (11.9%) | 5599 | (23.6%) |
| Hyperlipidemia‡ | 2518 | (37.8%) | 2447 | (40.1%) | 720‖ | (14.2%) | 1563 | (26.5%) | 7248 | (30.6%) |
| TC/HDL ratio | 4.7 | ± 1.6 | 4.8 | ± 1.5 | 3.8 | ± 1.1 | 4.2 | ± 1.3 | 4.4 | ± 1.4 |
| Moderate stenosis | ||||||||||
| Observed prevalence | 1.8% | 0.6% | 0.8% | 4.4% | 2.0% | |||||
| Expected prevalence# | 1.9% | 1.3% | 2.6% | 2.1% | 2.0% | |||||
| Severe stenosis | ||||||||||
| Observed prevalence | 0.7% | 0.1% | 0.2% | 1.1% | 0.5% | |||||
| Expected prevalence# | 0.8% | 0.3% | 0.8% | 0.5% | 0.5% | |||||
*
Hypertension is defined as a systolic blood pressure above 140mmHg or an diastolic blood pressure above 90mmHg.
†
Diabetes mellitus is defined as a glucose level above 6.9mmol/l or anti diabetic medicine use.
‡
Hyperlipidemia defined as an TC/HDL ratio above 5mmol/l or statin use.
§
inclusion criteria: age 65 and older.
‖
classification method: peak systolic velocity ratio method (Tromso), lumen diameter reduction (MDCS), cross sectional area reduction method (CAPS), peak systolic velocity (CHS).
#
given the risk factor distribution of the total study population.