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. 2023 Sep 6;13(9):e066182. doi: 10.1136/bmjopen-2022-066182

Figure 4.

Figure 4

Forest plots of studies reporting adjusted analyses for the prioritised adverse birth outcomes. ITB, immortal time bias; NR, not reported; ROB, risk of bias; TIIV, trivalent inactivated influenza vaccine. Numbers followed by plus signs (+) are lower than the actual total numbers included in the meta-analysis due to unreported raw data in one or more studies.