Table 1.

Qualitative analysis of the included controlled clinical trials (sinus augmentation).

Randomization	Allocation concealment	Blinding of participants personnel and outcome assessors	Completeness of follow-up	Selective reporting (statistical reporting)	Other bias	References
+	+	*	+	+	+	(60)
+	+	*	+	+	+	(61, 62)
+	*	*	+	+	+	(63)
+	+	*	+	+	+	(64)