Table 4.

Overview of the investigated factors and their association with adherence.

		Colls J. et al.	Jamilloux Y. et al.	Rosen D. et al.	Guzman J.R.S. et al.	Ross E.L. et al.	Strength of Evidence
Social/economic dimension	Sex	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	Moderate
	Increasing age	↑	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$	Inconsistent
	Higher education	$\boxed{\leftrightarrow }$					Inconsistent
	Married		↑	$\boxed{\leftrightarrow }$	$\boxed{\leftrightarrow }$		Inconsistent
	Annual income				$\boxed{\leftrightarrow }$		Inconclusive
	Number of children at home		↑				Inconclusive
	Area of residence		$\boxed{\leftrightarrow }$				Inconclusive
	Employment status		$\boxed{\leftrightarrow }$				Inconclusive
Condition related dimension	Sever symptoms	↓				↑	Inconsistent
	Longer symptom duration					$\boxed{\leftrightarrow }$	Inconclusive
Patient related dimension	Depression			$\boxed{\leftrightarrow }$			weak
	Comorbidity				↓		Inconsistent
	Existing experience in online surveys		↑				Inconclusive
Therapy/intervention related dimension	Satisfaction with the app/web-based intervention	$\boxed{\leftrightarrow }$				↑	Inconsistent
Healthcare team related dimension	Primary care compared to specialized care				↑		Inconclusive

↑ = significant positive association with adherence, ↓ = significant negative association with adherence, $\boxed{\leftrightarrow }$ = no significant association with adherence.