Divergent Significance of Bone Mineral Density Changes in Aging Depending on Sites and Sex Revealed through Separate Analyses of Bone Mineral Content and Area

Table 1

Characteristics of subjects.

	Women	Men
Age (years)	56.5±9.9	57.9±9.9
Height (cm)
All	152.2±5.7 (𝑛=573)	165.4±5.9 (𝑛=594)
40s	154.9±5.0 (𝑛=168)	168.7±5.5 (𝑛=148)
50s	153.3±4.8 (𝑛=179)	166.3±5.7 (𝑛=183)
60s	150.4±5.6 (𝑛=147)	164.0±4.7 (𝑛=162)
70s	147.0±5.0 (𝑛=79)	161.0±5.2 (𝑛=101)
Weight (kg)
All	53.0±8.0; (𝑛=573)	62.8±8.5; (𝑛=594)
40s	54.1±8.0; (𝑛=168)	66.4±8.8; (𝑛=148)
50s	53.7±7.4; (𝑛=179)	63.5±8.1; (𝑛=183)
60s	53.0±8.0; (𝑛=147)	61.2±7.8; (𝑛=162)
70s	49.1±7.9; (𝑛=79)	58.8±7.5; (𝑛=101)
BMI (kg/m^2)
All	22.9±3.2; (𝑛=573)	22.9±2.6; (𝑛=594)
40s	22.5±3.3; (𝑛=168)	23.3±2.6; (𝑛=148)
50s	22.9±3.2; (𝑛=179)	23.0±2.5; (𝑛=183)
60s	23.4±3.1; (𝑛=147)	22.8±2.7; (𝑛=162)
70s	22.7±3.1; (𝑛=79)	22.6±2.5; (𝑛=101)
BMD at 1st wave
Femoral neck (g/cm^2)	0.7±0.1	0.8±0.1
Trochanter (g/cm^2)	0.6±0.1	0.7±0.1
Lumbar spine (L2–4) (g/cm^2)	0.9±0.2	1.0±0.2
BMC at 1st wave
Femoral neck (g)	3.2±0.6	4.0±0.7
Trochanter (g)	6.0±1.3	8.7±1.6
Lumbar spine (L2–4) (g)	38.1±9.3	50.7±10.0
Area at 1st wave
Femoral neck (cm^2)	4.6±0.3	5.3±0.3
Trochanter (cm^2)	10.2±1.2	12.8±1.4
Lumbar spine (L2–4) (cm^2)	42.3±3.9	51.3±4.5

Values are mean ± SD.