Table 1.

Data of interest that will be sought from eligible studies

Author details	Name of first author, journal where the article was published, language and publication year.
Study characteristics	Study design, sampling method, data collection period and time of data collection (eg, a 2016 study may have data from 2009).
Participants’ characteristics	Age, BMI, BF% and waist circumference.
Firefighters’ characteristics	Job status (volunteer, career or military), years of service and type of firefighter (eg, industrial, hazard material and wildland).
Outcomes	Obesity and overweight prevalence.
Methods used to define obesity	BMI, BF% or waist circumference.

BF%, body fat percentage; BMI, body mass index.