Table 2.
Summary of the studies’ characteristics included in the review.
| Reference | Methodological Evaluation (%) | n | Age (Years) | Sex (F/M) |
MS Definition | Analyzed Variables | ||
|---|---|---|---|---|---|---|---|---|
| Time | Frequency | Non-Linear | ||||||
| Aso et al., 2006 [31] | 94% | 104 | 43–70 | Both (48/52) |
NCEP ATP III | No | HF, LF, LF/HF | No |
| Stein et al., 2007 [21] | 75% | 899 | 67–76 | Both (56/44) |
NCEP ATP III | SDNN, SDANN, SDNNi, rMSSD, pNN50 | HF, LF, TP, VLF, ULF | DFA-1 |
| Gehi et al., 2009 [22] | 88% | 288 | 50–57 | Men (0/100) |
AHA y NHLBI | No | HF, LF, TP, VLF, ULF | No |
| Assoumou et al., 2010 [26] | 94% | 1010 | 64–66 | Both (60/40) |
NCEP-ATP III | No | TP, HF, LF, VLF, ULF, LF/HF | No |
| Rasic-Milutinovic et al., 2010 [27] | 88% | 47 | 50–60 | Both (60/40) |
NCEP ATP III | SDNN, rMSSD | HF, LF, LF/HF, TP, VLF | No |
| Poliwczak et al., 2013 [24] | 94% | 80 | 50–55 | Men (0/100) |
IDF | SDNN, SDANN, SDNNi, rMSSD, pNN50 | HF, LF, LF/HF, TP, VLF, ULF | No |
| Jarczok et al., 2013 [28] | 88% | 2441 | 18–67 | Both (24/76) |
IC | SDNN, rMSSD | HF, LF, LF/HF | No |
| Wulsin et al., 2016 [23] | 94% | 1143 | 40–57 | Both (57/43) |
IC | SDNN, rMSSD | No | No |
| Yoo et al., 2016 [32] | 94% | 1200 | 50–60 | Both (60/40) |
NCEP ATP III | SDNN, SDANN, rMSSD | No | No |
| Balcioglu et al., 2016 [29] | 94% | 150 | 48–74 | Both (65/35) |
NCEP ATP III | SDNN, SDANN, SDNNi, rMSSD, pNN50 | No | No |
| Ma et al., 2017 [11] | 94% | 401 | 46–64 | Both (41/59) |
NCEP ATP III | SDNN, rMSSD, pNN50, pNN20 | HF, LF, LF/HF, TP, VLF | SD1, SD2, SD1/SD2, Multiscale entropy |
| Slušnienė et al., 2019 [30] | 81% | 106 | 50–55 | Both (49/51) |
NCEP ATP III | SDNN, SDANN, SDNNi, rMSSD, pNN50 | HF, LF, LF/HF, VLF | No |
| MacIorowska et al., 2020 [25] | 69% | 118 | 34–58 | Both (32/86) |
IDF | SDNN, rMSSD, pNN50 | HF, LF, LF/HF, TP | No |
NCEP-ATP III: National Cholesterol Education Program’s Adult Treatment Panel III. IDF: International Diabetes Federation. AHA: American Heart Association. NHLBI: National Heart Lung and Blood Institute. Alberti et al., 2009 [33]. IC: Consensus definition from several national and international organizations. F/M: ratio female/male expressed in percentage (%).