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. 2012 Dec 26;7(12):e52729. doi: 10.1371/journal.pone.0052729

Table 2. Means ± standard deviations of respiration-uncorrected and respiration-corrected RSA indices, respiration measures, and HR for Still-Face Test episodes.

Play Still-Face1 Reunion1 Still-Face2 Reunion2
Test 1 (n = 23)
RSA (ms) 11.4±4.1 9.8±4.8 10.8±5.9
logRSA (log ms) 1.47±0.22 1.26±0.29 1.35±0.29
RSAc (ms) 12.0±1.8 10.0±1.7 11.3±3.1
logRSAc (log ms) 1.48±0.12 1.29±0.17 1.38±0.21
RSA/VT (ms/mL) 0.168±0.068 0.126±0.066 0.129±0.057
logRSA/VT (log ms/mL) 0.136±0.048 0.102±0.048 0.107±0.042
RSA/VTc (ms/mL) 0.172±0.028 0.134±0.033 0.136±0.026
logRSA/VTc (log s/mL) 0.139±0.020 0.108±0.022 0.112±0.020
TTOT (s) 1.31±0.17 1.43±0.14 1.34±0.16
VT (mL) 86.7±27.4 103.1±24.4 105.3±36.1
HR (b/min) 135.0±11.5 146.6±12.6 144.5±11.2
Test 1 and 2 (n = 16)
RSA (ms) 10.6±3.9 9.1±4.5 10.0±3.0 7.5±4.1 9.1±3.8
logRSA (log ms) 1.43±0.20 1.22±0.29 1.39±0.29 1.08±0.32 1.28±0.31
RSAc (ms) 10.5±1.4 8.8±1.5 10.1±1.32 6.6±2.7 8.7±2.5
logRSAc (log ms) 1.40±0.12 1.20±0.17 1.37±0.16 1.03±0.27 1.24±0.23
RSA/VT (ms/mL) 0.160±0.058 0.120±0.061 0.130±0.047 0.086±0.061 0.110±0.052
logRSA/VT (log ms/mL) 0.132±0.042 0.100±0.046 0.109±0.035 0.072±0.045 0.093±0.041
RSA/VTc (ms/mL) 0.153±0.029 0.115±0.030 0.124±0.022 0.080±0.051 0.105±0.044
logRSA/VTc (log ms/mL) 0.125±0.021 0.095±0.022 0.105±0.016 0.068±0.037 0.089±0.032
TTOT (s) 1.28±0.14 1.41±0.11 1.30±0.12 1.57±0.20 1.42±0.15
VT (mL) 81.4±19.6 94.9±22.6 94.5±26.7 108.9±21.5 102.3±26.4
HR (b/min) 137.4±10.5 147.1±12.5 142.3±10.2 152.1±15.5 149.3±16.4

Note: HR = heart rate; VT = tidal volume; RSA = respiratory sinus arrhythmia; TTOT = total respiratory cycle time; HR = heart rate; RSA/VT = RSA normalized by VT; c = adjusted for TTOT; logRSA = logarithm(RSA+1); logRSA/VT = logarithm(RSA/VT)+1.