“…Ten of the 44 studies (22.7%) reported significant differences in adherence between genders [8,16,31,37,46,65,70,73,78,84]. Of these, nine (90%) [8,16,31,46,65,70,73,78,84] [37] was conducted in Spain and used an adherence cutoff of 80%. It should be noted that the majority of articles did not specify whether there was a significant relationship between gender and adherence, as adherence by gender was not the main focus and/or because there was no significant relationship to report.…”