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. 2019 Dec 15;9(12):e033780. doi: 10.1136/bmjopen-2019-033780

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Heart rate variability parameters in controls and in women with PCOS at age 46 in seated position. The users of beta-blockers were excluded. Values are mean±SD or median with 25% and 75% quartiles, and the significance testing was made by Student’s t test (ln-transform was made to achieve normality). HR, heart rate; rMSSD, the root mean square of successive R–R differences; LF_RRi, low-frequency (0.04–0.15 Hz) power; HF_RRi, high-frequency (0.15–0.4 Hz) power; α₁, short-term fractal-like scaling exponent by detrended fluctuation analysis; SBP, systolic blood pressure; BRS, baroreflex sensitivity; PCOS, polycystic ovary syndrome.