Table 6.

Outcomes and bias of trials with a focus on influenza vaccination.

Reference	Participant age (years), mean (SD)	Attrition rate	Main outcomes	Bias tool	Bias rating	Bias reasoning
Moniz et al (2013) [47]	Ranged 13-49	23% (46/204)	No difference in influenza vaccination rate (33% vs 31%)	Cochrane ROBTa	Low risk	N/Ab
Yudin (2017) [48]	32.2 (4.5) for IGc vs 32.4 (4.9) for CGd	10.7% (34/317)	No difference in influenza vaccination rate (31% vs 27%; P=.51)	Cochrane ROBT	Low risk	N/A

^aROBT: risk of bias tool.

^bN/A: not applicable.

^cIG: intervention group.

^dCG: control group.