biologia - Studia

MODIFICATIONS OF BONE PARAMETERS IN OSTEOPOROSIS
hip bone. Our results (Fig. 2) show there is a direct, but not very tight connection
between the bone mineral density at the vertebral column and at the hip bone, the
value of the R correlation quotient being 0.4521 (R 2 = 0.2044, p=0.6786).
Fig. 1. A. Evolution of bone mineral density (BMD) with age; B. The regression between
age and BMD mean values, as determined at the vertebral column; C. The regression
between age and BMD mean values, as determined at the hip bone.
Since the T-score is calculated by taking into account the absolute value of
the bone mineral density, the correlations between regions are similar, even if they
are made in accordance with the bone mineral density (Fig. 1), or with the T-score.
By realizing the regressions between the patients’ age and the T- and Z-
scores at the vertebral column and hip bone, we can notice that the correlation
quotient does not show a tight connection in none of these cases. Nevertheless, in
the case of the regression between age and the T-score (Fig. 3) there is, for the T-
95