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Table 3 Test statistics for evaluation of the response and recovery to the stressful task

From: Autonomic and muscular responses and recovery to one-hour laboratory mental stress in healthy subjects

Variable rANOVA* Baseline vs. 0–10 min 0–10 vs. 50–60 min 50–60 vs. 65–75 min
Surface electromyography     
   Trapezius (μV) F(2.5,105.6) = 7.3, p < 0.001 t(43) = -2.9, p = 0.006 t(43) = 1.0, p = 0.33 t(43) = 3.1, p = 0.003
   Splenius (μV) F(3.3,144.0) = 0.96, p = 0.42 t(43) = 1.1, p = 0.28 t(43) = 0.5, p = 0.62 t(43) = -0.2, p = 0.80
   Temporalis (μV) F(2.7,117.8) = 1.2, p = 0.31 t(43) = 0.0, p = 0.96 t(43) = -2.3, p = 0.03 t(43) = -0.9, p = 0.39
   Frontalis (μV) F(3.2,138.2) = 11.3, p < 0.001 t43) = -3.8, p < 0.001 t(43) = -0.4, p = 0.69 t(43) = 3.3, p = 0.002
Systolic blood pressure (mmHg) F(2.8,14.3) = 11.4, p < 0.001 t(40) = -7.0, p < 0.001 t(40) = 0.3, p = 0.78 t(41) = 1.5, p = 0.15
Diastolic blood pressure (mmHg) F(3.0,118.2) = 17.4, p < 0.001 t(40) = -7.6, p < 0.001 t(40) = 0.4, p = 0.66 t(41) = 0.1, p = 0.96
Heart rate (beats/min) F(2.6,103.2) = 24.1, p < 0.001 t(40) = -4.5, p < 0.001 t(42) = 3.7, p = 0.001 t(42) = 8.1, p < 0.001
Respiration (breaths/min) F(4.3,155.2) = 21.7, p < 0.001 t(36) = -4.6, p < 0.001 t(36) = 2.1, p = 0.04 t(36) = 6.1, p < 0.001
Finger skin blood flow (au) F(2.6,113.2) = 6.2, p < 0.001 t(43) = 3.6, p = 0.001 t(43) = 1.8, p = 0.09 t(43) = 1.6, p = 0.12
Pain (VAS 0–100 mm)     
   Maximal location (mm) F(3.2,139.4) = 7.8, p < 0.001 Z = -1.4, p = 0.17 Z = -4.6, p < 0.001 Z = -4.0, p < 0.001
   Shoulder (mm) F(2.7,112.5) = 3.8, p = 0.02 Z = -0.3, p = 0.75 Z = -4.3, p < 0.001 Z = -3.5, p < 0.001
   Neck (mm) F(2.4,98.9) = 4.5, p = 0.01 Z = -0.6, p = 0.52 Z = -4.3, p < 0.001 Z = -3.2, p = 0.001
   Temples (mm) F(2.0,86.5) = 4.1, p = 0.02 Z = -2.2, p = 0.03 Z = -1.9, p = 0.06 Z = -2.7, p = 0.006
   Forehead (mm) F(2.1,89.5) = 4.0, p = 0.02 Z = -2.5, p = 0.01 Z = -2.7, p = 0.008 Z = -2.7, p = 0.008
Fatigue (VAS 0–100 mm) F(3.2,129.0) = 17.0, p < 0.001 Z = -0.6, p = 0.52 Z = -5.2, p < 0.001 Z = -4.4, p < 0.001
Tension (VAS 0–100 mm) F(2.6,104.7) = 16.1, p < 0.001 Z = -2.4, p = 0.02 Z = -4.5, p < 0.001 Z = -4.9, p < 0.001
   50–60 vs. 85–95 min Baseline vs. 65–75 min Baseline vs. 85–95 min
Surface electromyography     
   Trapezius (μV)   t(43) = 2.8, p = 0.008 t(43) = 0.9, p = 0.40 t(43) = -0.12, p = 0.99
   Splenius (μV)   t(43) = -7.1, p = 0.48 t(43) = 1.4, p = 0.16 t(43) = 0.65, p = 0.54
   Temporalis (μV)   t(43) = 0.2, p = 0.83 t(43) = -2.0, p = 0.05 t(43) = -1.2, p = 0.24
   Frontalis (μV)   t(43) = 4.5, p < 0.001 t(43) = -1.7, p = 0.10 t(43) = -0.44, p = 0.67
Systolic blood pressure (mmHg)   t(41) = 0.54, p = 0.60 t(40) = -7.1, p < 0.001 t(40) = -6.5, p < 0.001
Diastolic blood pressure (mmHg)   t(41) = -0.4, p = 0.69 t(40) = -9.5, p < 0.001 t(40) = -9.2, p < 0.001
Heart rate (beats/min)   t(42) = 7.0, p < 0.001 t(40) = 3.1, p = 0.004 t(40) = 3.2, p = 0.003
Respiration (breaths/min)   t(36) = 5.6, p < 0.001 t(36) = 2.2, p = 0.03 t(36) = 1.5, p = 0.14
Finger skin blood flow (au)   t(43) = 1.7, p = 0.10 t(43) = 5.4, p < 0.001 t(43) = 5.0, p < 0.001
Pain (VAS 0–100 mm)   60 vs. 95 min 0 vs. 75 min 0 vs. 95 min
   Maximal location (mm)   Z = -4.0, p < 0.001 Z = -2.5, p = 0.01 Z = -2.4, p = 0.015
   Shoulder (mm)   Z = -3.5, p < 0.001 Z = -1.7, p = 0.08 Z = -1.3, p = 0.20
   Neck (mm)   Z = -2.7, p = 0.007 Z = -2.1, p = 0.04 Z = -2.2, p = 0.03
   Temples (mm)   Z = -2.7, p = 0.007 Z = -0.4, p = 0.72 Z = -0.51, p = 0.61
   Forehead (mm)   Z = -2.7, p = 0.007 Z = -0.7, p = 0.48 Z = -0.40, p = 0.69
Fatigue (VAS 0–100 mm)   Z = -4.4, p < 0.001 Z = -3.2, p = 0.001 Z = -2.6, p = 0.009
Tension (VAS 0–100 mm)   Z = -4.8, p < 0.001 Z = -0.3, p = 0.78 Z = -1.5, p = 0.13
  1. au: arbitrary units. BP: blood pressure
  2. * ANOVA repeated measures (no between-subjects factors, time effect) with ten time intervals (baseline, 0–10, .., 85–95 min) and Huynh-Feldt corrected degrees of freedom. All other statistics are paired statistics (Student's paired t-tests for physiological variables and Wilcoxon paired statistics for subjective variables used in explorative contrast analysis).