Table 2.

Pearson's correlation test of sinus width, sinus angle and graft bone resorption based on the classification of residual bone height.

Anatomical factor	RBH	GR
		n	r	P value
SW	2 mm ≤ RBH＜5 mm	36	0.465	0.004∗∗
	5 mm ≤ RBH＜8 mm	27	0.385	0.047∗
SA	2 mm ≤ RBH＜5 mm	36	0.390	0.019∗
	5 mm ≤ RBH＜8 mm	27	0.438	0.022b

SW = sinus width; SA = sinus angle; GR = graft bone resorption.

∗∗Correlation is significant at level 0.01 (two-tailed).

∗Correlation is significant at level 0.05 (two-tailed).