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. 2015 Mar 30;10(3):e0118308. doi: 10.1371/journal.pone.0118308

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© 2015 Voss et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 3 — The box plots show two selected HRV indices (A: SD1 (PPA) and B: SPPA_r_8 (SPPA)) for the five investigated age decades (1: 25–34, 2: 35–44, 3: 45–54, 4: 55–64 and 5: 65–74 years) and divided into males (black cross-striped boxes) and females (white boxes). The boxes show the data between the 25th and 75 Percentile, the middle line represents the median.