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Table 2 Methodological quality assessment of included studies

From: The prevention of anaphylactoid reactions to iodinated radiological contrast media: a systematic review

Study

Allocation concealment

Blinding

Intention to treat analysis

Predefined outcomes

Gates 1972 [13]

No

No

Unclear

No

Small 1982 [14]

Unclear

Unclear

Unclear

No

Bertrand 1992 [16]

Unclear

"Double-blind"

Yes

Yes

Ring 1985 [15]

Unclear

"Single"

No

Unclear

Lasser 1987 [17]

Yes

Yes

Unclear

Yes

Lasser 1994 [18]

Yes

Yes

Yes

Yes