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Table 1 Data to be collected in the data extraction of included studies

From: Modes of transmission and attack rates of group A Streptococcal infection: a protocol for a systematic review and meta-analysis

Information on studies

Information on participants

Information on infections

• Study author

• Study year

• Study design

• Study setting (domestic, nosocomial or public)

• Geographical region

• Age group/range

• Gender

• Income category

• Ethnicity

• Health conditions which might increase the risk of Strep A infection or carriage, e.g. immunodeficiency states (immunocompetent or immunocompromised) or underlying diseases

• Modes of Strep A transmission

• Types of Strep A infections

• Symptoms

• Strep A emm strains

• Time period in which transmission occurred

• Season of participation

• Number of people exposed (denominator)

• Numbers of people with Strep A infected/detected (only primary transmission) (numerator)

• Number of deaths

• Asymptomatic carriage rates

• Sampling method used to collect samples

• Laboratory methods used to analyse samples