Age, continent of study origin, zinc salt and risk of bias contributed significantly to between studies heterogeneity.
In addition, analyses by continent of study (Europe, North America, or other) yielded consistent, positive associations between PM2.5 and lung cancer.
The association between total alcohol intake (none, any regular consumption) and risk of ovarian carcinoma varied somewhat across studies following multivariable adjustment; the source of heterogeneity was within the three European studies when evaluated by continent of study origin (within-group heterogeneity: Europe, I 2 =75%; North America, I 2 =0%).
We exploit strong connections to major research facilities on four continents to study exotic forms of nuclear matter, fundamental symmetries of nature, characteristics of the Higgs boson, neutrino interactions, and more.
No significant between-group difference was found for continent of residence, study quality, age category, and sex.
The great Gregor Piatigorsky advised her, as a child of Jewish parents at a time of turmoil on the continent, to study in London.
Continent, gender and time of study did not contribute to heterogeneity (Results not shown, disease specific Galbraith plots included in Figures S1, S2, S3, S4).
Lazarus Moro, who fancied substituting fire for water to explain the formation of continents, started to study the product of ancient volcanoes which before were little known or unknown.
Variables assessed using meta-regression included country of study population (grouped by continent), study design, and data ascertainment method.
Stratified analyses were performed to evaluate the influences of selected study quality and participant characteristics on study results (10): sex, mean age at baseline, different definitions of MetS, depression measure, continent of origin, and study quality.
