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Table 1 Demographic characteristics of study populations

From: Screening for low bone mass with quantitative ultrasonography in a community without dual-energy X-ray absorptiometry: population-based survey

     Weight BMI
Age stratum (y) Men Women Total Men* Women* Men* Women*
Study group        
40–49 618 (34.8) 1156 (65.2) 1774 (27.3) 71.7 ± 10.3 59.3 ± 9.3 24.9 ± 3.3 24.1 ± 2.6
50–59 666 (40.2) 991 (59.8) 1657 (25.5) 70.1 ± 10.4 60.5 ± 9.4 25.0 ± 3.2 25.0 ± 3.5
60–69 882 (52.7) 793 (47.3) 1675 (25.8) 65.7 ± 10.2 58.9 ± 9.6 24.2 ± 3.2 25.3 ± 3.8
70–79 482 (44.9) 592 (55.1) 1074 (16.5) 63.2 ± 9.9 57.2 ± 9.9 23.8 ± 3.3 25.3 ± 4.0
≥80 144 (46.0) 169 (54.0) 313 (4.8) 61.3 ± 10.6 54.0 ± 10.4 23.6 ± 3.3 24.3 ± 4.0
Total 2792 (43.0) 3701 (57.0) 6493 (100) 67.4 ± 10.8 58.9 ± 9.7 24.4 ± 3.3 24.8 ± 3.7
Reference group        
20–29 96 (57.8) 70 (42.3) 166 (100) 62.4 ± 12.0 49.7 ± 4.8 21.8 ± 2.7 19.3 ± 1.4
  1. Data are the number (percentage) or mean ± SD.
  2. *p ≤ 0.01 on the analysis of variance for the study sub-group.
  3. p ≤ 0.01 on the t test between both gender.
  4. Not significant.