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Table 1 Risk of bias items for each included randomized control trial study

From: A systematic review of the effect of sleep interventions on presenteeism

 

Random sequence generation

Allocation concealment

Blinding of participants and personnel

Blinding of outcome assessment

Incomplete outcome data

Selective outcome reporting

Other sources of bias

Bostock et al. [16]

+

+

?

+

?

?

+

Behrendt et al. [29]

+

+

+

?

Wolever et al. [30]

?

?

?

?

+

?

+

Morgan et al. [31]

?

+

+

+

?

+

  1. Low risk of bias is “+”. High risk of bias is “-”. Unclear risk of bias is “?”