Table 2 Estimates of parameters of the third degree polynomial regression model
From: Reference Ranges for Bone Mineral Density and Prevalence of Osteoporosis in Vietnamese Men and Women
Bone mineral density | Parameters | R2 | SEE | ||
|---|---|---|---|---|---|
|  | β 1 age | β2 age2 | β3 age3 |  |  |
Femoral neck | Â | Â | Â | Â | Â |
   Men | 0.01098 | -0.00038 | 0.0000027 | 0.38 | 0.11 |
| Â | (0.00698) | -0.00015 | -0.000001 | Â | Â |
   Women | 0.01119 | -0.00029 | 0.0000016 | 0.38 | 0.1 |
| Â | (0.0044) | (0.00009) | (0.0000006) | Â | Â |
Total hip | Â | Â | Â | Â | Â |
   Men | 0.0198 | -0.0005 | 0.000003 | 0.18 | 0.13 |
| Â | (0.0082) | (0.0001) | (0.000001) | Â | Â |
   Women | 0.0194 | -0.0004 | 0.000002 | 0.29 | 0.11 |
| Â | (0.005) | (0.0001) | (0.0000007) | Â | Â |
Lumbar spine | Â | Â | Â | Â | Â |
   Men | 0.0228 | -0.00053 | 0.000003 | 0.08 | 0.14 |
| Â | (0.0082) | (0.00018) | (0.000001) | Â | Â |
   Women | 0.0423 | -0.0009 | 0.000005 | 0.39 | 0.12 |
| Â | (0.0053) | (0.0001) | (0.0000008) | Â | Â |