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. 2021 Jul-Sep;15(3):396–404. doi: 10.1590/1980-57642021dn15-030013

Table 2. Bias of included studies.

Author and year of publication Focal matter Randomization Blindfold allocation Double blind Losses less<20% Analysis by intention to treat Prognostic characteristics Outcome Sample calculation JADAD
Uemura et al., 201513 2
Boyle et al., 200914 4
Zammit et al., 200815 3
Hindmarch et al., 200616 4
Bentué-Ferrer et al., 200317 3
Fairweather et al., 199218 3

Green shade: absence of bias; red shade: presence of bias; yellow shade: doubt.