Table 2.

Quality assessment of included studies

Study	Jadad score	Allocation concealment	Similarity in baseline characteristics	Eligibility criteria	Blinding			Completeness of follow-up	Intention- to-Treat Analysis
					Assessor	Provider	Patient
Davini 1992	1	No	No	Yes	No	No	No	Yes	No
Iliceto 1995	4	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Singh 1996	3	Yes	No	Yes	N/p	Yes	Yes	Yes	No
Iyer 1999	5	Yes	Yes	Yes	Yes	Yes	Yes	No	No
Tarantini 2006	3	Yes	Yes	Yes	N/p	Yes	Yes	Yes	Yes

N/p = Not provided.