Relationship between Weight, Body Mass Index, and Bone Mineral Density in Men Referred for Dual-Energy X-Ray Absorptiometry Scan in Isfahan, Iran
Table 1
Age, age-adjusted means (SD), and proportions of selected anthropometric and densitometric measures between 95 men with body mass index (BMI) < 25 kg/m2 and 135 men who had BMI ≥ 25.
Variables
BMI < 25 kg/m2
BMI ≥ 25 kg/m2
Difference (95% CI)
Mean (SD)
Mean (SD)
Age (yr.)
63.9 (7.9)
61.7 (8.1)
2.2 (0.08, 4.3)*
Height (cm)
168.1 (6.4)
168.3 (5.8)
−0.2 (−1.40, 1.80)
Weight (kg)
63.9 (7.1)
80.6 (8.6)
−16.7 (−18.50, −14.30)***
BMI (Kg/m2)
22.6 (1.7)
28.4 (2.4)
−5.8 (−6.46, −5.34)***
L2–L4 BMD (g/cm2)
0.99 (016)
1.09 (0.17)
−0.1 (−0.14, −0.06)***
Femoral neck BMD (g/cm2)
0.79 (0.12)
0.82 (0.12)
−0.03 (−0.07, −0.002)*
Trochanter BMD (g/cm2)
0.69 (0.10)
0.73 (0.11)
−0.04 (−0.06, −0.01)**
Femoral shaft BMD (g/cm2)
1.01 (0.13)
1.07 (0.15)
−0.06 (−0.10, −0.02)**
Total hip BMD (g/cm2)
0.88 (0.11)
0.94 (0.13
−0.06 (−0.09, −0.03)**
L2–L4 BMC (g)
50.0 (9.7)
56.0 (9.6)
−6.0 (−8.54, −3.46)***
Femoral neck BMC (g)
4.3 (0.8)
4.5 (0.7)
−0.20 (−0.40, −0.002)*
Trochanteric BMC (g)
10.6 (1.9)
11.6 (2.3)
−1.00 (−1.57, −0.43)***
Femoral shaft BMC (g)
17.3 (2.4)
18.8 (2.9)
−1.50 (−2.01, −0.59)***
Total hip BMC (g)
33.6 (4.5)
36.2 (5.3)
−2.6 (−3.92, −1.28)***
L2–L4 -score
−1.3 (0.8)
−0.8 (0.8)
−0.50 (−0.71, −0.29)***
Femur neck -score
−2.6 (0.9)
−2.3 (1.0)
−0.30 (−0.55, −0.05)*
Trochanter -score
−2.2 (0.8)
−1.8 (1.0)
−0.40 (−0.54, −0.06)**
Total hip -score
−2.1 (0.9)
−1.7 (1.1)
−0.4 (−0.67, −0.13)**
No. (%)
No. (%)
Osteoporosis
33 (34.7)
25 (18.5)
16.2 (4.62, 27.80)**
Osteopenia
56 (58.9)
88 (65.2)
−6.3 (−19.00, 6.51)
Normal weight (BMI < 25)
95 (100.0)
—
−
Overweight (BMI ≥ 25 < 30)
—
96 (71.1)
−71.1 (−78.8, −63.5)***
Obese (BMI ≥ 30)
—
39 (28.9)
−28.9 (−36.5, −21.2)***
Age-adjusted means were calculated using general linear models. The difference in the mean or percentage of the variables between BMI < 25 and BMI ≥ 25. *, **, and ***. CI: confidence interval.
