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Table 2 Comparison of peak height (tmax values) of auditory activations obtained with different scan durations (60 vs. 90s) and depending on anesthesia (no vs. yes). Mean values and standard deviations of tmax are given for different subgroups and smoothing kernels

From: Feasibility of 15O-water PET studies of auditory system activation during general anesthesia in children

Age group Condition   Tmax values and significance p, of difference
  S = [0 mm]3 S = [10 mm]3 S = [20 mm]3 S = [30 mm]3
Anesthesia Stimulation 60s. 90s p 60s. 90s p 60s. 90s p 60s. 90s p
Adults No PN 10.82 ± 2.39 12.06 ± 3.78 NS 11.68 ± 3.25 10.98 ± 5.24 NS 9.29 ± 3.91 8.54 ± 3.30 NS 7.14 ± 3.74 7.31 ± 6.57 NS
    NS p = 0.0313   p = 0.0001 p = 0.0071   p = 0.0004 p = 0.0194   p = 0.0054 NS  
Children Yes PN 9.56 ± 3.59 9.37 ± 3.43 NS 6.27 ± 2.52 6.86 ± 2.49 NS 4.81 ± 2.71 5.49 ± 4.27 NS 3.90 ± 2.54 4.09 ± 2.95 NS
Children Yes CI 10.06 ± 3.27 9.33 ± 2.99 NS 6.80 ± 2.10 8.07 ± 3.04 NS 5.28 ± 2.24 5.47 ± 2.96 NS 3.38 ± 1.16 4.40 ± 1.97 NS
  1. PN promontory needle electrode, CI cochlear implant, S smoothing kernel, NS not significant