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. 2021 Feb 5;16(2):e0246328. doi: 10.1371/journal.pone.0246328

Table 5. Self-reported improvement of tinnitus loudness in the follow-ups of treatment groups between years.

STEC group EC alone group ρ between methods
2020 27/38 (71%) 8/42 (19%) < .001*
2019 51/58 (88%) 9/17 (53%) .004**
ρ between year .038* .024**

*: chi-square test

**: Fisher’s Exact Test.