表 2.

腭中缝形态特点分期与牙龄的Spearman相关系数检验

Spearman correlation analysis between MPS stage and dental age

Items	Left lower canine			Left lower first premolar			Left lower second premolar			Left lower second molar
	Spearman	P value		Spearman	P value		Spearman	P value		Spearman	P value
Female	0.578	< 0.001		0.557	< 0.001		0.602	< 0.001		0.667	< 0.001
Male	0.668	< 0.001		0.662	< 0.001		0.676	< 0.001		0.699	< 0.001
Total	0.618	< 0.001		0.605	< 0.001		0.636	< 0.001		0.683	< 0.001