Review Article
Construction Formula of Biological Age Using the Principal Component Analysis
Table 4
Correlation coefficients and redundancy coefficients of each research.
| Researcher | Year | Correlation coefficient | Redundancy coefficient |
| Nakamura et al. [17] | 1989 | 0.24 | 0.5 | Ueno et al. [20] | 2003 | 0.25 | 0.9 | Nakamura and Miyao [21] | 2007 | | 0.6 | Nakamura and Miyao [22] | 2008 | | 0.6 | Park et al. [23] | 2009 | 0.15 | | Bai et al. [12] | 2010 | 0.25 | 0.4 | Jee et al. [11] | 2012 | 0.12 | 0.75 | Zhang et al. [24] | 2014 | 0.40 | 0.7 | Zhang et al. [25] | 2014 | 0.15 | 0.7 |
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