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. Author manuscript; available in PMC: 2017 Jul 27.
Published in final edited form as: Physiol Meas. 2017 May 10;38(6):1061–1076. doi: 10.1088/1361-6579/aa6e9c

Figure 6.

Figure 6

σrr (standard deviation of RR intervals) does not differ by PTSD status for 24 h of RR intervals (a; P = 0.25) but but is higher in control subjects for quiescent segments (b; P < 0.05). (a) 24 hours of data. (b) Quiescent segments.