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Table 5 Case study B: comparison of included primary studies and outcomes in the existing systematic reviews (Galvao et al. [14], Jefferson et al. [15], Fell et al. [13], and McMillan et al. [16])

From: Use of existing systematic reviews for evidence assessments in infectious disease prevention: a comparative case study

Maternal outcomes

Outcome

Primary study

Galvao et al. [14]

Jefferson et al. [15]

Fell et al. [13]

McMillan et al. [16]

Laboratory-confirmed influenza

Thompson et al. [30]

No (unclear)

No (date)

No (criteria)

Yes

 

Zaman et al. [31]

No (unclear)

No (unclear)

No (criteria)

Yes

Influenza-like illness

Black et al. [32]

No (unclear)

Yes

No (criteria)

Yes

 

Hulka [33]

Yes

Yes

No (criteria)

No (unclear)

 

Munoz et al. [34]

No (unclear)

No (unclear)

No (criteria)

Yes

 

Zaman et al. [31]

Yes

No (unclear)

No (criteria)

No (unclear)

Local adverse events

Hulka [33]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Yeager et al. [35]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Zaman et al. [31]

No (criteria)

No (unclear)

No (criteria)

Yes

Systemic adverse events

Englund et al. [36]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Hulka [33]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Lin et al. [37]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Yeager et al. [35]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Zaman et al. [31]

No (criteria)

No (unclear)

No (criteria)

Yes

Serious adverse events

Munoz et al. [34]

No (criteria)

No (unclear)

No (criteria)

Yes

 

Nordin et al. [38]

No (criteria)

Yes

No (criteria)

Yes

Preeclampsia

Munoz et al. [34]

No (criteria)

No (unclear)

No (criteria)

Yes

Infant outcomes

Lab-confirmed influenza

Benowitz et al. [39]

No (criteria)

Yes

No (criteria)

Yes

 

Eick et al. [40]

Yes

Yes

No (criteria)

Yes

 

Poeling et al. [41]

No (criteria)

Yes

No (criteria)

Yes

 

Zaman et al. [31]

Yes

No (unclear)

No (criteria)

Yes

Influenza-like illness

Black et al. [32]

No (unclear)

Yes

No (criteria)

Yes

 

Eick et al. [40]

No (unclear)

Yes

No (criteria)

Yes

 

France et al. [42]

No (unclear)

Yes

No (criteria)

No (unclear)

 

Munoz et al. [34]

No (unclear)

No (unclear)

No (criteria)

Yes

 

Zaman et al. [31]

Yes

No (unclear)

No (criteria)

Yes

Premature birth (<37 weeks)

Black et al. [32]

Yes

Yes

Yes

Yes

 

Chambers et al. [43]

No (unclear)

No (date)

Yes

Yes

 

Dodds et al. [44]

No (unclear)

No (unclear)

Yes

No (unclear)

 

Legge et al. [45]

No (date)

No (date)

Yes

No (unclear)

 

Louik et al. [46]

No (date)

No (unclear)

Yes

No (unclear)

 

Munoz et al. [34]

Yes

Yes

Yes

Yes

 

Omer et al. [47]

Yes

Yes

Yes

Yes

 

Sheffield et al. [48]

Yes

Yes

Yes

Yes

 

Steinhoff et al. [49]

No (unclear)

No (unclear)

Yes

No (unclear)

 

Zaman et al. [31]

Yes

No (unclear)

No (unclear)

No (unclear)

Fetal death (>500 g)

Sheffield et al. [48]

Yes

Yes

Yes

Yes

Spontaneous abortion

Irving et al. [50]

No (criteria)

No (date)

No (criteria)

Yes

Congenital malformation

Munoz et al. [34]

No (criteria)

Yes

No (criteria)

No (unclear)

 

Sheffield et al. [48]

No (criteria)

Yes

No (criteria)

Yes

Small for gestational age

Omer et al. [47]

Yes

No (unclear)

No (criteria)

Yes

 

Sheffield et al. [48]

Yes

No (unclear)

No (criteria)

Yes

 

Zaman et al. [31]

Yes

No (unclear)

No (criteria)

No (unclear)

Neonatal death

Sheffield et al. [48]

Yes

Yes

No (criteria)

No (unclear)

  1. No, no included (with reasons for exclusion in parenthesis: date = published after search date of the SR; criteria = inclusion criteria of the SR not met; unclear = reason for exclusion from the SR unclear); Yes, included