Bone Mineral Density and Body Composition of Adult Premenopausal Women with Three Levels of Physical Activity

Table 4

Simple linear regression results for all three groups (𝑛=48).

Independent variable	BMC (g)	BMD total skeleton (g/cm^2)	BMD lumbar spine (g/cm^2)	BMD femoral neck (g/cm^2)	BMD total hip (g/cm^2)	BMD 33% radius (g/cm^2)
Age (years)	𝑅=0.0308	𝑅=0.0173	𝑅=0.0958	𝑅=0.3170	𝑅=0.2057	𝑅=0.0936
	𝑃=0.8352	𝑃=0.9074	𝑃=0.5173	𝑃=0.0281	𝑃=0.1601	𝑃=0.5268
Duration of practice (years)	𝑅=0.4523	𝑅=0.4576	𝑅=0.4516	𝑅=0.5202	𝑅=0.5394	𝑅=0.1555
	𝑃=0.0012	𝑃=0.0011	𝑃=0.0013	𝑃=0.0002	𝑃<0.0001	𝑃=0.2913
Physical activity (MET-min/week)	𝑅=0.5065	𝑅=0.4704	𝑅=0.4919	𝑅=0.5303	𝑅=0.5563	𝑅=0.1026
	𝑃=0.0002	𝑃=0.0007	𝑃=0.0004	𝑃=0.0001	𝑃<0.0001	𝑃=0.4876
Weight (kg)	𝑅=0.6055	𝑅=0.3407	𝑅=0.3315	𝑅=0.2012	𝑅=0.1573	𝑅=0.4433
	𝑃<0.0001	𝑃=0.0178	𝑃=0.0214	𝑃=0.1702	𝑃=0.2858	𝑃=0.0016
BMI (kg/m^2)	𝑅=0.3500	𝑅=0.1876	𝑅=0.2282	𝑅=0.1391	𝑅=0.1031	𝑅=0.3607
	𝑃=0.0147	𝑃=0.2017	𝑃=0.1188	𝑃=0.3456	𝑃=0.4859	𝑃=0.0118
Body fat mass (kg)	𝑅=0.2730	𝑅=0.0151	𝑅=0.0965	𝑅=0.0896	𝑅=0.1127	𝑅=0.3158
	𝑃=0.0606	𝑃=0.9188	𝑃=0.5143	𝑃=0.5449	𝑃=0.4457	𝑃=0.0288
NFSTM (kg)	𝑅=0.5667	𝑅=0.4696	𝑅=0.3548	𝑅=0.3762	𝑅=0.3348	𝑅=0.2864
	𝑃<0.0001	𝑃=0.0008	𝑃=0.0133	𝑃=0.0084	𝑃=0.0200	𝑃=0.0484
Body fat mass index (kg/m^2)	𝑅=0.1447	𝑅=0.0689	𝑅=0.0250	𝑅=0.1375	𝑅=0.1555	𝑅=0.2475
	𝑃=0.3263	𝑃=0.2194	𝑃=0.8861	𝑃=0.3514	𝑃=0.2912	𝑃=0.0899
NFSTM Index (kg/m^2)	𝑅=0.3189	𝑅=0.3956	𝑅=0.2593	𝑅=0.3528	𝑅=0.3291	𝑅=0.1803
	𝑃=0.0271	𝑃=0.0054	𝑃=0.0751	𝑃=0.0139	𝑃=0.0224	𝑃=0.2201

BMC: total bone mineral content; BMD: bone mineral density; BMI: body mass index; NFSTM: non-fat soft tissue mass.
𝑅: Pearson’s coefficient of correlation. Values of 𝑃 indicate the probability of the slope between the independent and the dependent variable being nonsignificantly different from zero.