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. Author manuscript; available in PMC: 2021 May 1.
Published in final edited form as: BJOG. 2020 Nov 19;128(6):1077–1086. doi: 10.1111/1471-0528.16562

Box.

Overview of participants and exposure definitions by exposed group and control groups 1 and 2

Exposed group:
Maternal CHIKV
during pregnancy		 Control group 1:
No history of
maternal CHIKV		 Control group 2:
Maternal CHIKV
outside of
pregnancy
Pregnant during CHIKV outbreak Pregnant during CHIKV outbreak Pregnant during CHIKV outbreak
and and and
Reported history of CHIKV during pregnancy (joint pain and fever, rash or muscle pain CHIKV IgG-negative Reported history of CHIKV outside of pregnancy (joint pain and fever, rash or muscle pain)
and and
CHIKV IgG positive CHIKV IgG-positive