Characteristics of the included studies
The main characteristics of the included studies are presented in Table
1. The publication years ranged from 2010 to 2021, with the first
members of the offspring cohort delivered in 1997. The sample sizes of
the included studies ranged from 476 to 698,056, and 10,010 pregnant
mothers were exposed to neuraminidase inhibitors during pregnancy; only
one study examined an Eastern population. Overall, two were
hospital-based cohort studies. Based on the methodological quality
assessment scores, most studies were deemed to be of high quality; only
one was categorized as low quality. The score breakdown is shown in
Table S2.