Maglione 2002c

Methods	Data are reported for Utah‐Nevada. For details see Maglione 2002a
Participants	See Maglione 2002a
Interventions	See Maglione 2002a
Outcomes	See Maglione 2002a
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Described only as "RCT"
Allocation concealment (selection bias)	Unclear risk	No statement
Blinding (performance bias and detection bias) All outcomes	Unclear risk	No statement
Incomplete outcome data (attrition bias) All outcomes	Low risk	96% of those ≥ 65 are covered by Medicare Part B, which processes all billing claims for influenza vaccination
Selective reporting (reporting bias)	Low risk	No selective reporting