Table 6.
Calculation of weight threshold at which bone densitometry becomes cost-effective for men
| Age (years) | Age- and sex-specific prevalence low BMD (%) | Cost-effective pre-test probability of low BMD (%) | Age- and sex-specific odds low BMD | Threshold odds low BMD | Change in log [Odds] | Odds low BMD per 10 kg increase in weight (log [Odds]) | Weight change from mean to reach threshold | ||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
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| Odds | Log (Odds) | Odds | Log (Odds) | ||||||
| 55 | 2.03 | 15.2 | 0.0207 | −3.878 | 0.1789 | −1.721 | 2.158 | 0.40 (−0.916) | −23.8 |
| 60 | 2.77 | 8.87 | 0.0285 | −3.558 | 0.0855 | −2.460 | 1.228 | 0.40 (−0.916) | −12.1 |
| 65 | 4.65 | 4.46 | 0.0487 | −3.021 | 0.0467 | −3.063 | −0.042 | 0.44 (−0.821) | 0.5 |
| 70 | 7.23 | 2.68 | 0.0780 | −2.551 | 0.0275 | −3.592 | −1.041 | 0.44 (−0.821) | 12.5 |
| 75 | 8.38 | 2.44 | 0.0915 | −2.392 | 0.0250 | −3.687 | −1.296 | 0.44 (−0.821) | 15.6 |
| 80 | 10.74 | 1.30 | 0.1203 | −2.118 | 0.0215 | −4.327 | −2.118 | 0.44 (−0.821) | 26.6 |