BioMed Research International / 2015 / Article / Tab 1

Review Article

Inverse Association between Prediagnostic IgE Levels and the Risk of Brain Tumors: A Systematic Review and Meta-Analysis

Table 1

Characteristics of all studies.

StudyYearBrain tumorsOriginsNumber of casesNumber of controlsBaseline timeMatching factors

Amirian et al. [17]2013GliomaUSA3624622001–2006Age, sex, and frequency
Schwartzbaum et al. [20]2012GliomaNorway59411771974–2007Date of blood collection, 2-year age interval at blood collection, and sex
Schlehofer et al. [19]2011GliomaEurope2755282002–2005Study centre, gender, data of birth, age, date of blood collection, time of blood collection, and length of followup
Schlehofer et al. [19]2011MeningiomaEurope1753432002–2005Study centre, gender, data of birth, age, date of blood collection, time of blood collection, and length of followup
Calboli et al. [18]2011GliomaUSA1695201976–2009Age, age at blood draw, age at diagnosis, and ethnicity
Wiemels et al. [23]2011MeningiomaUSA2651452006–2009Age, frequency, and state of residence
Wiemels et al. [22]2009GliomaUSA3934702001–2004Age, sex, ethnicity, and frequency
Wiemels et al. [21]2004GliomaUSA228289 1997–2000Age, sex, ethnicity, and frequency