Even increments in serum glucose and insulin levels were observed after 8-weeks EGCG-rich green tea extract intervention, leading to the development of diseases such as diabetes [ 37].
Although the same aqueous extract intervention was investigated in pre-clinical and clinical studies, it contained additional herbal extracts and it was irrational to attribute hormonal effects to Paeonia lactiflora and Cinnamomum cassia.
As a confirmation in this study, the G6PDH gene expression which was significantly decreased in untreated diabetic rats, in conformity with previous report [ 17] became highly expressed at the end of the extract intervention.
Stage 1 included: 1) forming an advisory group; 2) searching for descriptions of interventions in trials (CENTRAL database) and general health literature (Medline); 3) developing a sampling strategy; 4) screening the search results; 5) developing a data extraction form; and 6) extracting intervention data.
Additionally, investigators are asked to check the extracted intervention characteristics from their studies to ensure a correct interpretation of interventions.
The differences, for instance, in the proportion of the DMFT explained by the M component in adolescents residing in rural compared with urban areas implied that in addition to a restorative intervention, those in rural localities also had greater surgical (teeth extracted) intervention.
The following information was extracted: interventions, participants, setting, methods, outcome measures, number of participants, results.
Based on the information retrieved from the guidelines, the relevance and availability in different European countries of the extracted interventions were discussed and grouped in a 1-day meeting in Vienna.
Serum samples were extracted before intervention, right after intervention, and two hours after manipulation by venipuncture of the cephalic vein using a Vacutainer system (Becton-Dickinson, United Kingdom).
The different components in each intervention were categorized, and data were extracted on intervention intensity (number of sessions, duration), setting (e.g., primary care, hospital), the professionals involved, delivery method (e.g., individual or group, face-to-face or remote delivery), and quality control (training, supervision, written manuals, and assessments of adherence or competence).
The following data were extracted: participants, intervention description and the degree of implementation, comparative interventions and outcomes.
