Association between NSAIDs and Clostridium difficile-Associated Diarrhea: A Systematic Review and Meta-Analysis

Table 2

Summary of quality assessment.

Author	Selection (max. 4)	Comparability (max. 2)	Exposure (max. 3)
Dial et al. [5]	4	2	2
El Feghaly et al. [16]	3	0	2
Loo et al. [15]	3	2	3
Manges et al. [14]	4	2	2
Naggie et al. [13]	4	2	2
Pépin et al. [18]	2	2	2
Regnault et al. [12]	2	0	2
Soes et al. [11]	4	2	2
Suissa et al. [10]	4	2	2