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. 2019 Oct 22;14(10):e0223657. doi: 10.1371/journal.pone.0223657

Table 2. Correlation matrix of model variables.

2 3 4
1 Cumulative times of blood donation 0.22** 0.14** 0.19**
2 Cognition in blood donation - 0.17** 0.19**
3 PCS - - 0.58**
4 MCS - - -

PCS: physical component summary; MCS: mental component summary.

** p<0.01 (both sides).

- indicates no correlation coefficient or repeated calculations.