Carotid intima-media thickness and calcification in relation to bone mineral density in postmenopausal women-the OSTPRE-BBA study.

OBJECTIVES

Atherosclerosis (AS) and osteoporosis are common diseases in elderly people and may be metabolically related. The aim of this cross-sectional population-based study was to explore the association between common carotid artery intima-media thickness (cIMT), carotid artery calcification (CAC), and BMD in postmenopausal women. In addition, the association of postmenopausal hormone therapy (HT) and selected diseases with cIMT and carotid calcification was studied.

STUDY DESIGN

The 290 women (mean age 73.6 years) included in this Bone Brain Atherosclerosis study (OSTPRE-BBA) were randomly selected from the population-based Kuopio Osteoporosis Risk Factor and Prevention (OSTPRE) study cohort, Finland.

MAIN OUTCOME MEASURES

For this cross-sectional study, cIMT was measured with B-mode ultrasound; femoral neck and total body BMD were measured with dual-energy X-ray absorptiometry.

RESULTS

There were no statistically significant associations between mean cIMT and femoral neck T-score (p>0.05). However, an increased maximum cIMT was significantly associated with low femoral neck T-score. In the osteoporotic group (T-score <-2.5, n=20), the maximum cIMT was 2.51±0.88mm (mean±SD); in the normal BMD group (T-score >-1, n=122), it was 1.93±0.64mm (p=0.001). The odds of having CAC were approximately four-fold higher in the osteoporotic group compared with the group with a normal femoral neck T-score (odds ratio [OR]=4.2, p=0.038). The maximum cIMT was smaller in HT users (1.98±0.56mm, n=190) than in non-users (2.16±0.74mm, n=156, p=0.036).

CONCLUSIONS

The results of our population-based study suggest that BMD is related to AS, at least in carotid arteries. They indirectly support the hypothesis of partially shared pathophysiological mechanisms between these two disorders.