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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Early Hum Dev. 2018 Jul 17;123:11–16. doi: 10.1016/j.earlhumdev.2018.07.003

Figure 1: Time and Frequency Domain Receiver Operating Characteristic Curves (ROC).

Figure 1:

The ROC area under the curve was calculated for (A) time domain indices (α1, α2, RMS1 [sec], and RMS2 [sec]) and for (B) frequency domain indices (nLF, nHF, LF [dB], and HF [dB]). The curves show higher ANS tone in term control versus preterm infants at term-equivalent age in α1, RMS1, RMS2, nLF, LF, and HF. The diagonal dashed line indicates an area under the curve of 0.5.