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Figure 1 | BMC Medicine

Figure 1

From: The association between dietary factors and gestational hypertension and pre-eclampsia: a systematic review and meta-analysis of observational studies

Figure 1

Flow diagram for selection of studies included in systematic review and meta-analyses on the association between dietary factors and gestational hypertension and/or pre-eclampsia. Articles reporting on both gestational hypertension and pre-eclampsia were included as two separate studies, and the number of studies suitable for pooling of results varied for the different dietary factors. (a) No desirable outcome, for example, combined pre-eclampsia with disorders other than gestational hypertension or examined oxidative stress or blood pressure in pregnancy; (b) No desirable exposure, that is, not reported on dietary intake as exposure.

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