Table 3.

Caffeine consumption measurement by each study included in meta-analysis.

Study (first author and year)	Total caffeine intake (mg/day)
Birerdinc et al. [2012]	Total caffeine intake (mg/day)
Catalano et al. [2010]	Espresso coffee intake (cups/day)
Gutierrez-Grobe et al. [2012]	Total caffeine intake (mg/day)
Bambha et al. [2014]	Coffee (unspecified) intake (cups/day)
Anty et al. [2012]	Total caffeine intake (g/week), caffeine from espresso, regular coffee, tea and chocolate or soda (g/week)
Molloy et al. [2012]	Total caffeine or regular coffee caffeine intake (mg/day)