Using PubMed citations, it extracts authors' names and creates a map illustrating connections based on frequency of collaboration or co-authorship.
The following background information on the articles was extracted: authors, year of publications, journal, country where the study was conducted and method of data collection and analysis.
From each study we extracted: authors, publication date, location, overweight/obesity definitions, asthma definitions, number of participants, recruitment duration, description of cohort, follow-up time, adjusted effect estimates (with 95% CI) and estimates of subgroup analysis.
We also extracted authors, publication years, study periods, study locations, study designs, target populations, names of infections, sample sizes, and participants' demographics to identify the characteristics of the studies and populations.
The following study characteristics were extracted: author, year, design, sample, time points, length of measurement, target range and key results.
Two non-clinician researchers (EE and AD) independently extracted author interpretations and participant data from the included studies using a piloted data extraction sheet.
From the latter, the following information was extracted: author, study location, year, type of population (general or patients), dependent variable(s), independent variable(s), type of CCO design, and whether effect modification was analyzed for variables at the individual level.
The following data were extracted: author, year of publication, study setting, number of MSM, number of MSM aged 25 or younger, sample collection method, HPV DNA testing method, and HPV type tested.
For each study, the following data were extracted: author(s); publication year; country of origin; study design; study population size and description; data-collection period; and prevalence rates for hypertension, obesity, and hypertension with obesity.
In addition, we extracted the authors' conclusion on the additional benefit.
