Influence of lean and fat mass on bone mineral density and on urinary stone risk factors in healthy women

Table 4 Body composition of healthy women split into two groups based on the Index of Lean Mass (ILM)

	Group A	Group B	p (*)	p critical values (0.0029 < p < 0.0025)
	Low lean mass	High lean mass
	ILM < 1296	ILM > 1296
	N. 39	N. 39
ILM	1035 ± 205	1625 ± 313	<0.0001	###
Age, years	46 ± 6	46 ± 6	0.956
Menopausal, n., % (°)	11 (28)	8 (21)	0.590**
Years from menopause	1.4 ± 3	0.9 ± 2	0.416
Weight, Kg	65 ± 10	68 ± 11	0.268
Height, cm	159 ± 6	163 ± 5	<0.0001	###
BMI, Kg/m²	26 ± 4	25 ± 4	0.612
Total trunk mass, Kg	31 ± 5	32 ± 6	0.289
Total lower limb mass, Kg	22 ± 4	23 ± 4	0.460
Total lean mass, Kg	40 ± 4	45 ± 5	<0.0001	###
Total fat mass, Kg	23 ± 6	21 ± 7	0.07
BMD upper limbs, g/cm²	0.72 ± 0.04	0.76 ± 0.08	0.003	###
BMD ribs, g/cm²	0.64 ± 0.08	0.68 ± 0.07	0.035
BMD lower limbs, g/cm²	1.10 ± 0.07	1.15 ± 0.1	0.026
BMD pelvis, g/cm²	1.20 ± 0.15	1.24 ± 0.18	0.307
BMD lumbar vertebrae, g/cm²	1 ± 0.13	1.04 ± 0.15	0.217
BMD femur, g/cm²	0.91 ± 0.12	0.95 ± 0.11	0.232
T-score lumbar vertebrae (+)	−0.17 (−2.50 – 2.31)	−0.45 (−2.54 – 2.87)	0.442***
Z-score lumbar vertebrae (+)	0.41 (−1.92 – 2.73)	0.34 (−1.49 – 3.21)	0.407***
T-score femur (+)	−0.16 (−1.92 – 2.07)	−0.09 (−1,50 – 1.52)	0.165***
Z-score femur (+)	0.27 (−1.52 – 2.43)	0.37 (−1.27 – 1.93)	0.225***

Data were reported as mean ± standard deviation (SD), unless otherwise specified.
°Data were reported as number of subjects (frequency).
+Data were reported as median and range.
*p value was calculated with nondependent Student’s t test, unless otherwise specified.
**χ² test was applied to evaluate p value.
***Mann-Whithey’s u-test was applied to evaluate p value.
###Significant differences with p adjusted by Holm’s test.
BMD: Bone Mineral Density.

ISSN: 1479-5876