Research Article
The Significance of Body Mass Index in Calculating the Cut-Off Points for Low Muscle Mass in the Elderly: Methodological Issues
Table 3
Basic characteristics of body composition of young healthy males included in the study (reference group) and elderly ones (studied group).
| Characteristics | Males 20–30 years () mean ± SD | Range | Elderly males () mean ± SD | Range | P value |
| Age, (years) | 22.19 ± 2.42 | 20.00–30.00 | 73.73 ± 7.53 | 60.00–89.00 | <0.001 | Weight, (kg) | 78.34 ± 10.85 | 54.60–122.20 | 80.10 ± 13.04 | 51.00–119.60 | ns | Height, (m) | 1.81 ± 0.06 | 1.62–1.99 | 1.69 ± 0.06 | 1.55–1.85 | <0.001 | BMI, (kg/m2) | 23.93 ± 2.89 | 17.90–39.68 | 27.98 ± 3.82 | 19.11–37.39 | <0.001 | Muscle mass*, (kg) | 37.45 ± 4.65 | 24.90–51.20 | 31.23 ± 4.19 | 22.40–43.40 | <0.001 | Fat free mass*, (kg) | 65.84 ± 7.74 | 45.40–88.80 | 56.44 ± 6.98 | 41.00–77.50 | <0.001 | Appendicular lean mass, (kg) | 28.35 ± 3.48 | 17.94–37.88 | 23.30 ± 3.29 | 16.52–33.17 | <0.001 | Fat mass*, (kg) | 12.48 ± 6.14 | 2.90–49.80 | 23.62 ± 7.71 | 6.00–42.10 | <0.001 | Percent body fat*, (%) | 15.54 ± 5.85 | 3.80–40.70 | 28.90 ± 6.25 | 10.90–46.90 | <0.001 | Total body water*, (L) | 48.26 ± 5.63 | 33.30–65.10 | 41.51 ± 5.28 | 29.10–57.40 | <0.001 | ALM index, (kg/m2) | 8.64 ± 0.66 | 6.75–10.79 | 8.13 ± 0.83 | 6.37–10.47 | <0.001 |
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BMI: body mass index; ALM: appendicular lean mass; SD: standard deviation; *these parameters are from the whole body; ns: not significant (P 0.05).
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