Evidence-Based Complementary and Alternative Medicine / 2011 / Article / Tab 2

Review Article

Systematic Review of Clinical Trials Assessing the Effectiveness of Ivy Leaf (Hedera Helix) for Acute Upper Respiratory Tract Infections

Table 2

Quality assessment of included studies.

ReferenceEPHPP Section ratings (strong/moderate/weak)Global ratingJadad score(0–5)
Selection biasStudy designConfoundersBlindingData collectionWithdrawals

Randomized controlled trials (RCTs)

Kemmerich et al. 2006moderatestrongstrongstrongweakstrongstrong5
Unkauf and Friedrich 2000weakstrongmoderateweakweakstrongweak2

Controlled trials (CCTs)

Bolbot et al. 2004moderatemoderateweakweakmoderatestrongweakn.a.

Observational studies (OSs)

Büechi and Kähler 2003weakmoderateweakweakweakweakweak
Büechi et al. 2005weakmoderateweakweakweakstrongweak
Fazio et al. 2009moderatemoderateweakweakweakstrongweak
Hecker 1999weakmoderateweakweakweakweakweakn.a.
Leskow 1985weakmoderatemoderateweakweakweakweak
Marzian 2007moderatemoderateweakweakweakweakweak
Santoro Júnior 2005moderatemoderatemoderateweakweakstrongweak

n.a. = not applicable.

We are committed to sharing findings related to COVID-19 as quickly as possible. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. Review articles are excluded from this waiver policy. Sign up here as a reviewer to help fast-track new submissions.