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Table 1 Correlation coefficients and age

From: Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleep

  age Method 1 vs. Method 2 Method 1 vs. HRV Method 2 vs. HRV
Subject [yrs] r 1 r 2 r 3 r 4 r 5 r 6 r 7 r 8 r 9
b05 25.4 0.80 0.97 0.60 -0.51 0.43 -0.61 -0.66 0.67 -0.87
a02 26.7 0.80 0.90 0.67 -0.43 -0.16 -0.31 -0.43 0.01 -0.49
b09 28.4 0.86 0.83 0.60 -0.58 -0.34 -0.33 -0.43 0.10 -0.81
b06 30.6 0.80 0.83 0.72 -0.35 0.12 -0.50 -0.40 0.03 -0.52
b08 30.6 0.91 0.80 0.61 -0.27 -0.37 -0.09 -0.40 -0.18 -0.33
b01 30.8 0.91 0.96 0.67 -0.53 -0.32 -0.25 -0.43 0.29 -0.79
b02 31.0 0.83 0.62 0.78 -0.07 0.32 -0.57 0.00 0.55 -0.79
a22 31.7 0.72 0.92 0.58 -0.63 -0.38 -0.27 -0.47 -0.07 -0.51
a01 32.2 0.79 0.94 0.53 -0.27 0.31 -0.60 -0.35 0.46 -0.83
a03 34.4 0.75 0.86 0.85 -0.36 0.27 -0.71 -0.17 0.48 -0.83
b03 35.4 0.79 0.81 0.70 -0.64 -0.55 -0.18 -0.67 -0.42 -0.45
b11 36.6 0.85 0.86 0.65 -0.43 -0.05 -0.48 -0.20 0.04 -0.30
b07 39.5 0.80 0.94 0.74 -0.44 -0.35 -0.16 -0.41 -0.15 -0.41
b51 39.9 0.75 0.85 0.71 -0.76 0.01 -0.55 -0.54 0.48 -0.81
a21 47.1 0.66 0.69 0.28 -0.49 0.06 -0.55 -0.28 0.47 -0.63
a20 48.4 0.65 0.76 0.09 -0.23 -0.14 0.06 -0.06 0.18 -0.24
b54 53.4 0.79 0.48 0.58 -0.56 -0.09 -0.56 -0.24 0.3 -0.62
b10 54.8 0.79 0.80 0.40 -0.35 -0.19 -0.11 -0.45 0.39 -0.77
b53 66.7 0.66 0.78 0.34 0.00 0.01 0.01 0.36 0.18 0.09
b52 75.3 0.62 0.66 0.48 0.12 0.54 -0.48 -0.18 0.08 -0.21
  1. Linear correlation coefficients between both gray-scale maps (r1), PCR1 and PCR2 (r2), and PR and PP (r3), are dependent on age. In most cases, the correlation between PR and LF (r4), PR and HF (r5), PR and BAL (r6), PP and LF (r7), and PP and HF (r8) is significant but very low, suggesting that phase and pattern recurrency is related to linear HRV parameters but contain also additional information, e.g. on cardiorespiratory coordination. Only PP and BAL (r9) are markedly anti-correlated, at least in 8 subjects (r9 < -0.76) which may also be due to a methodological link between both parameters (see Discussion).