Dalby 2000

Methods	Purpose: to compare encouragement by visiting nurse to receive influenza vaccination to no intervention Design: RCT Duration of study: 14 months Interval between intervention and when outcome was measured: within 14 months  of study Power computation: α = 0.05, β = 0.8, difference = 15%, requires n = 128 Statistics: Chi2, Fisher's exact; Student's t‐test, Mann‐Whitney U test
Participants	Country: Canada Setting: practices of 2 physicians in Stoney Creek, Ontario Eligible participants: (health status): individuals ≥ 70 and functional impairment or admission to hospital or bereavement in past 6 months Age: ≥ 70, avg 78.5 Gender: 71% f in nurse group, 62% in control
Interventions	Intervention 1: encouragement by visiting nurse during comprehensive assessments to receive influenza vaccination, care plan developed with physician Control: no intervention
Outcomes	Outcome measured: % influenza vaccination Time points from the study that are considered in the review or measured or reported in the study: 14 months, dates not stated % vaccinated by: not stated
Notes	Funding: Ontario Ministry of Health
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	"Eligible participants were randomly assigned ... by a research assistant not affiliated with the HSO using a random number table. The randomization schedule was developed by another research assistant, who was not involved in the randomization process."
Allocation concealment (selection bias)	Low risk	"The randomizations schedule was kept within the Health Services Delivery Research Unit of the St. Joseph's Community Health centre throughout the trial."
Blinding (performance bias and detection bias) All outcomes	Unclear risk	No statement
Incomplete outcome data (attrition bias) All outcomes	Low risk	"... a research nurse conducted a detailed audit of all participants' medical records"
Selective reporting (reporting bias)	Low risk	No selective reporting