Antiviral therapy in cytomegalovirus-positive ulcerative colitis: A systematic review and meta-analysis

Table 2 Quality of studies on cytomegalovirus in ulcerative colitis assessed according to modified New-Castle Ottawa Scale

Total	Outcome	Comparability	Selection	Ref.
1			*	Al-Zafiri et al[14], 2012
3	*		**	Criscuoli et al[17], 2011
4	*	*	**	Kim et al[12], 2012
1			*	Kopylov et al[16], 2013
3		*	**	Maconi et al[10], 2011
3		*	**	Maruyama et al[15], 2012
4	*	*	**	Omiya et al[8], 2010
4	*		***	Roblin et al[13], 2011
1			*	Zeki et al[9], 2010
24/54 (44.4%)	4/9 (44.4%)	4/18 (22.2%)	16/27 (59.3%)	Total

In each category, a number of points from 1 (minimal) to 3 (maximal) are attributed by each reviewer. The total score represents a sum of the points achieved at every category.