First author, year published
|
Outcome
|
Confounding
|
Selection
|
Intervention classification
|
Intervention deviations
|
Missing data
|
Outcome measurement
|
Reported results
|
Overall
|
---|
Rousculp, 2010 [27]
|
Attend work with severe ILI
|
Moderatea
|
Low
|
Low
|
Low
|
Low
|
Moderateb
|
Seriousc
|
Serious
|
Kumar, 2012 [28]
|
ILI
|
Seriousd
|
Low
|
Moderatee
|
Low
|
Moderatef
|
Moderateb
|
Low
|
Critical
|
Lee, 2010 [29]
|
Seroconversion to 2009 influenza A(H1N1)
|
Seriousd
|
Low
|
Low
|
Low
|
Low
|
Low
|
Low
|
Serious
|
- Abbreviations: ILI influenza-like illness
- *Assessed using the Risk of Bias in Epidemiological Studies of Interventions (ROBINS-I) tool. Risk of bias for each domain is classified into four categories: low (study is comparable to a well performed randomized trial), moderate (study is sound for a non-randomized study but cannot be considered comparable to a well performed randomized trial), serious (study has some important problems), and critical (study is too problematic to provide any useful evidence on the effects of intervention)
- aA nonrandomized study is rarely at low risk of bias for confounding
- bSubjective outcome self-reported by participants who were aware of the intervention group
- cResults for attending work with ILI symptoms of any severity are not reported
- dInadequate or no adjustment
- eIntervention status was determined retrospectively
- fResponse rate was 56%