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Table 1 Comparison between P300 and TMT in cases and controls

From: Can electrophysiological tests be used as screening tools in detection of cognitive impairment in obstructive sleep apnea hypopnea syndrome?

  Before sleep After sleep
Cases (n = 20) Control (n = 20) P value Cases (n = 20) Control (n = 20) P value
Mean SD Mean SD Mean SD Mean SD
P300 L (ms) 346.15 27.39 371.00 28.84 0.018* 369.85 22.92 351.60 26.27 0.02*
P300 A (μV) 12.00 7.87 9.16 5.33 0.289 16.20 9.67 10.07 5.81 0.013*
Mean RT (ms) 507.30 131.85 491.65 78.31 0.221 596.95 135.84 464.30 93.65 0.003*
TMT A (s) 89.80 40.39 80.50 29.71 0.718 70.40 38.20 73.05 25.39 0.369
TMT B (s) 122.60 32.05 118.75 29.94 0.698 103.95 29.48 101.85 29.34 0.64
  1. L latency, ms millisecond, A amplitude, μV microvolt, RT reaction time, TMT trail making test, s second
  2. *Statistically significant