Table 3.

Descriptions of the extraction patterns and anchorage patterns.

Pattern		Description
Extraction Patterns	4444	maxillary and mandibular first premolar extraction
	4455	maxillary first premolar and mandibular second premolar extraction
	5555	maxillary and mandibular second premolar extraction
	others	other extraction patterns including only maxillary first premolar extraction, maxillary second premolar and mandibular first premolar extraction
Anchorage Patterns	1100	maxillary maximum anchorage
	1111	maxillary and mandibular maximum anchorage
	0000	no use of maximum anchorage