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Table. 4.

Table. 4.

Assessment of the risk of bias (N=8)

Author Clear purpose statement Target selection criteria Prospective data collection Draw a conclusion that be
right to research purpose
Reasonable evaluation about result Appropriate follow-up period Less
than 5%
of the eliminate
Sample
size calculation standard
Appropriate control group Simultaneous adminis-tration of the test and control groups Homoge-neous test between groups Appropriate statistical analyzes
Ha, Jung [19] 2 2 2 2 0 1 0 2 2 2 2 2
Hwang, Park [20] 2 2 2 2 0 2 0 2 2 2 1 2
Lee, Kim, Kang, Kim [21] 2 2 2 2 1 1 2 2 2 2 1 2
Son, Ki [22] 2 2 2 2 1 1 2 2 2 1 1 2
Kim, Heo [23] 2 2 2 2 0 1 2 2 2 2 2 2
Yang [24] 2 2 2 2 0 1 0 2 2 2 2 2
Hur, Song [25] 2 2 2 2 1 2 2 0 2 2 1 2
Kim, Heo, Jeon, Jung [26] 2 2 2 2 1 1 1 2 2 2 2 2
Stress 2021;29:168-77 https://doi.org/10.17547/kjsr.2021.29.3.168
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