Læknablaðið - 15.07.2003, Blaðsíða 32

FRÆÐIGREINAR / BEINÞÉTTNI KVENNA
Table III. Bivariate analysis.
n Lumbar spine BMD*g/cm2 Femoral neck BMD*g/cm2 Total hip BMD * g/cm2 Whole body BMD* g/cm2
Mean (95% Cl) Mean (95% Cl) Mean (95% Cl) Mean (95% Cl)
Height (cm)
<157 40 0.85 (0.75-0.95) 0.65 (0.59-0.71) 0.75 (0.68-0.82) 0.84 (0.79-0.90)
158-162 80 0.95 (0.91-0.99) 0.68 (0.65-0.70) 0.76 (0.73-0.78) 0.92 (0.90-0.94)
163-168 92 0.92 (0.89-0.96) 0.68 (0.66-0.71) 0.76 (0.74-0.78) 0.91 (0.89-0.93)
>168 32 0.93 (0.87-0.99) 0.72 (0.68-0.76) 0.79 (0.75-0.83) 0.92 (0.89-0.96)
Weight (kg)
<60 55 0.84 (0.79-0.88) 0.65 (0.62-0.68) 0.69 (0.66-0.72) 0.88 (0.85-0.90)
61-70 68 0.92 (0.87-0.97) 0.67 (0.64-0.70) 0.75 (0.71-0.78 0.90 (0.87-0.92)
71-80 71 0.93 (0.87-0.99) 0.69 (0.66-0.73) 0.78 (0.74-0.82) 0.91 (0.88-0.94)
>80 50 0.96 (0.87-1.05) 0.72 (0.66-0.77) 0.84 (0.78-0.90) 0.92 (0.87-0.97)
BMI** (kg/rrf)
<20 13 0.77 (0.67-0.86) 0.60 (0.55-0.66) 0.64 (0.57-0.70) 0.86 (0.80-0.91)
21-25 75 0.89 (0.86-0.93) 0.66 (0.63-0.67) 0.72 (0.70-0.75) 0.90 (0.87-0.92)
26-30 101 0.94 (0.91-0.97) 0.70 (0.67-0.72) 0.78 (0.75-0.80) 0.91 (0.89-0.93)
>30 57 0.10 (0.96-1.04) 0.72 (0.69-0.75) 0.82 (0.79-0.85) 0.95 (0.92-0.98)
Number of leisure waiks per week
0 75 0.95 (0.86-1.04) 0.70 (0.64-0.75) 0.76 (0.69-0.82) 0.91 (0.86-0.96)
1 26 0.98 (0.89-1.08) 0.71 (0.65-0.77) 0.80 (0.73-0.87) 0.95 (0.90-1.00)
2 23 1.03 (0.92-1.14) 0.72 (0.65-0.79) 0.82 (0.74-0.90) 0.95 (0.89-1.01)
3 27 1.01 (0.91-1.10) 0.69 (0.64-0.75) 0.77 (0.70-0.84) 0.93 (0.88-0.98)
4 13 0.90 (0.77-1.03) 0.64 (0.56-0.72) 0.74 (0.65-0.83) 0.89 (0.82-0.96)
5 28 0.90 (0.79-1.00) 0.66 (0.59-0.72) 0.75 (0.67-0.82) 0.89 (0.83-0.95)
6 13 0.95 (0.82-1.09) 0.72 (0.64-0.80) 0.80 (0.71-0.90) 0.97 (0.90-1.04)
7 39 0.90 (0.79-0.10) 0.69 (0.62-0.76) 0.78 (0.71-0.86) 0.91 (0.85-0.97)
Number of other i sxercise sessions per week
0 158 0.94 (0.89-0.99) 0.68 (0.65-0.71) 0.76 (0.72-0.79) 0.90 (0.87-0.93)
1 9 0.89 (0.76-1.01) 0.67 (0.59-0.75) 0.73 (0.64-0.82) 0.87 (0.80-0.94)
2 36 0.96 (0.89-1.03) 0.70 (0.65-0.75) 0.79 (0.74-0.84) 0.93 (0.89-0.97)
3 12 0.95 (0.84-1.06) 0.65 (0.58-0.72) 0.74 (0.66-0.82) 0.91 (0.85-0.97)
4 5 1.07 (0.91-1.23) 0.74 (0.64-0.84) 0.85 (0.73-0.96) 0.97 (0.88-1.10)
5 14 0.93 (0.83-1.04) 0.70 (0.63-0.77) 0.78 (0.70-0.85) 0.94 (0.88-1.00)
6 3 1.00 (0.80-1.20) 0.67 (0.55-0.80) 0.74 (0.60-0.89) 0.91 (0.80-1.02)
7 7 0.97 (0.84-1.11) 0.75 (0.66-0.83) 0.85 (0.75-0.95) 0.99 (0.92-1.07)
Finds the training hard / sweats
No 227 0.94 (0.90-0.98) 0.69 (0.67-0.72) 0.78 (0.75-0.81) 0.93 (0.90-0.95)
Yes 17 0.10 (0.91-1.08) 0.70 (0.65-0.76) 0.79 (0.72-0.85) 0.92 (0.88-0.97)
Work conditions (housework included) in the age of20-29 years
Mainly still 5 1.00 (0.85-1.16) 0.66 (0.56-0.76) 0.71 (0.60-0.82) 0.92 (0.83-1.00)
Varying from
still to
moving
around 90 0.89 (0.82-0.97) 0.65 (0.60-0.70) 0.74 (0.68-0.79) 0.87 (0.83-0.91)
Mainly
walking
without
heavy
loads 134 0.92 (0.85-0.99) 0.69 (0.64-0.73) 0.78 (0.73-0.83) 0.92 (0.88-0.96)
Hard work
including
walking 14 0.90 (0.80-1.01) 0.66 (0.60-0.73) 0.76 (0.68-0.84) 0.90 (0.84-0.96)
* BMD: Bone Mineral Density; ** BMI: Body Mass Index.
0,6% af heildarbreytileika beinþéttninnar og önnur
hreyfing skýrir 0,9-2,5% heildarbreytileikans.
Eina marktæka samhengið milli líkamsþjálfunar í
frístundum og beinþéttni var fyrir aðra þjálfun en
göngu og þéttni í heildarbeinagrind (3=0,008,
p=0,01). Sambandið við lendhrygg, lærleggsháls og
nærenda lærleggs var jákvætt en ekki marktækt
(p=0,07, p=0,15, p=0,09). Ekki fannst marktæk fylgni
milli fjölda gönguferða í viku og beinþéttni. Fyrir
beinþéttni lærleggsháls og nærenda lærleggs var sam-
bandið jákvætt en neikvætt fyrir beinþéttni í lend-
hrygg og heildarbeinagrind.
Niðurstöður úr fjölþátta aðhvarfsgreiningu íyrir
líkamlegt álag í vinnu eru sýndar í töflu V. Engin
marktæk fylgni fannst milli núverandi eða langvar-
andi álags við vinnu og beinþéttni eftir leiðréttingar
a
588 Læknablaðið 2003/89