Effect of physical activity and exercise on endometriosis-associated symptoms: a systematic review

BMC Women's Health

Table 2 Quality assessment for before-after (pre-post) studies with no control group

References	Question or objective stated	Eligible criteria pre-specified and described	Participants representative of clinical population	All eligible participants enrolled	Sample size sufficient	Intervention clearly described/delivered consistently	Outcomes prespecified /valid and reliable, and consistently implemented	Blinded assessors
Friggi Sebe Petrelluzzi et al. [25]	Yes	Yes	Yes	Yes	CD	Yes	Yes	NA
Awad et al. [26]	Yes	Yes	No	No	CD	Yes	Yes	NA

References	Dropout rate ≤ 20% or accounted for in the analysis	Statistics well described	Outcomes tested multiple times	Analysis of individual-level data	Confounding variables measured and adjusted	Exposure/risk defined/valid and reliable, and implemented consistently	Quality rating (poor/fair/good)
Friggi Sebe Petrelluzzi et al. [25]	Yes	Yes	no	NA	No	Yes	Poor
Awad et al. [26]	Yes	Yes	No	NA	No	No	Poor*

CD could not determine. Items “confounding variables measured and adjusted” and “exposure/risk defined/valid and reliable, and implemented consistently” was added to the original assessment form. *This study was excluded from the qualitative synthesis due to fatal flaws in its design

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