Biomedical Engineering Reference
In-Depth Information
Table 2
continued
% Change per decade*
Authors
Materials
Methods
Study design
Bone
Sex
D_P
D_M
TA
MA
CA
Moment of inertia
g
Kaji et al.
[ 13 ]
482 subjects
(252 female,
230 male)
26-84 years
pQCT (20 %
site)
CS
Radius
Female
(NS)
Increase
-
-
Decrease
-
Male
Increase
Increase
-
-
Decrease
d
Yuen et al.
[ 9 ]
1258 subjects
(638 female,
620 male)
20-98 years
pQCT (33 %
site)
CS
Radius
Female
-
-
-
-
-6.7
-3
Male
-
-
-
-
-2.5
-1.3
h
i
Ward et al.
[ 18 ]
728 men
40-79 years
pQCT (50 %
site)
CS
Radius
Male
-
-
0.8 (NS)
6.5
-2.7
-
D_P, periosteal diameter; D_M, medullary diameter; TA, total (subperiosteal) area; MA, medullary area; CA, cortical bone area
CS, cross-sectional study design; LNG, longitudinal study design
*Percent change calculated using slope of regression line (e.g, TA vs. age), multiplied by 10 and divided by overall mean (unless noted otherwise)
Slopes are taken from papers (if reported), or determined by linear regression from data presented in papers
(NS) regression is not statistically significant, p [ 0.05
Metacarpal: 50 % site (mid-shaft); Radius/Ulna: section location is given as absolute distance or percent of limb length, relative to the distal end
CS, Cross-sectional study design; LNG, Longitudinal study design
a
based on cross-sectional study design (Table 1 )
b
based on longitudinal analysis of subset of subjects (Table 2 )
c
authors computed area assuming circular cross-section
d
regressions based on mean values for the age groups reported
e
baseline age is at individual menopause, with avg. 15 year follow-up
f
slopes based on individual regressions for each subject; value at menopause is reference for % change
g
age correlation: significance and sign reported but not slope
h
slopes were presented separately for two study centers (Table 3 ); avg. values shown here
i
cortical thickness is reported, not cortical area
Search WWH ::




Custom Search