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. 2013 Mar 27;8(3):e59371. doi: 10.1371/journal.pone.0059371

Table 4. Correlations between magnitude and timings of various indices of wave reflection and height.

Correlation r p
AIx vs. height −0.43 0.001
log WRI vs. height 0.20 0.1
Pb/Pf vs. height 0.17 0.2
Ts vs. height 0.52 <0.001
Time of reflected wave vs. height 0.26 0.06
Time of Pb vs. height −0.15 0.3

AIx, augmentation index; Pb backward pressure; Pb/Pf, the ratio of forward to backward pressure; Ts, the time of the shoulder of the waveform; WRI, wave reflection index. Data are Pearson’s correlation coefficients. Data are Pearson’s correlation coefficients.