Table 5.

Summary of Global rating for Quality using EPHPP Quality Assessment tool for Quantitative Studies

Component	Gardiner et al [34]	Holt and Del Mar [36]	Gardiner et al [34]	Asuero et al. [37]
Selection Bias	Weak	Moderate	Weak	Moderate
Study Design	Moderate	Moderate	Moderate	Moderate
Confounders	Weak	Weak	Weak	Weak
Blinding	Weak	Weak	Weak	Weak
Data Collection Methods	Strong	Strong	Strong	Strong
Withdrawals and Dropouts	Strong	Moderate	Weak	Strong
GLOBAL RATING	WEAK	WEAK	WEAK	WEAK

Criteria for global rating; 1. Strong = no weak ratings 2. Moderate = one weak rating, 3. Weak = two or more weak ratings