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

Table 7 Body composition in healthy women split into two groups based on the Index of Fat Mass (IFM)

	Group C	Group D	p (*)	p critical value (0.0036 < p < 0.0025)
	Low fat mass	High fat mass
	IFM < 3.28	IFM > 3.28
	N. 39	N. 39
IFM	2.50 ± 0.42	5.14 ± 4.03	<0.0001	###
Age, years	45 ± 6	47 ± 6	0.23
Menopause, n., % (°)	8 (21)	11 (28)	0.429**
Years from menopause	0.8 ± 3	1.5 ± 3	0.336
Weight, Kg	60 ± 7	73 ± 10	<0.0001	###
Height, cm	161 ± 6	161 ± 6	0.467
BMI, Kg/m²	23 ± 2	28 ± 3	<0.0001	###
Total trunk mass, Kg	28 ± 4	35 ± 6	<0.0001	###
Total lower limb mass, Kg	21 ± 3	25 ± 3	<0.0001	###
Total lean mass, Kg	41 ± 5	43 ± 5	0.064
Total fat mass, Kg	17 ± 3	27 ± 5	<0.0001	###
BMD upper limbs, g/cm²	0.74 ± 0.08	0.73 ± 0.06	0.347
BMD ribs, g/cm²	0.66 ± 0.08	0.66 ± 0.07	0.886
BMD lower limbs, g/cm²	1.13 ± 0.09	1.13 ± 0.09	0.896
BMD pelvis, g/cm²	1.18 ± 0.15	1.27 ± 0.17	0.013
BMD lumbar vertebrae, g/cm²	0.98 ± 0.13	1.06 ± 0.14	0.018
BMD femur, g/cm²	0.90 ± 0.10	0.96 ± 0.12	0.025
T-score lumbar vertebrae (+)	−0.55 (−2.54 – 2.87)	0.25 (−2.50 – 2.68)	0.013***
Z-score lumbar vertebrae (+)	−0.13 (−1.92 – 3.19)	0.63 (−1.46 – 3.21)	0.004***
T-score femur (+)	−0.52 (−1.55 – 1.25)	0.24 (−1.92 – 2–07)	0.034***
Z-score femur (+)	−0.18 (−1.27 – 1.93)	0.61 (−1.52 – 2.43)	0.014***

Data were reported as mean ± standard deviation (SD), unless otherwise specified.
°Data were reported as number of patients (frequency).
+ Data were reported as median and range.
*p value was calculated with independent Student’s t-test, unless otherwise specified.
**χ² test was applied to evaluate p value.
***Mann-Whitney’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