Table 2

General interpretations of PCA and FA loadings.

Pattern

General interpretation of loadings


PCA

PC1

all maxillary teeth and mandibular premolars and molars

PC2

molars vs. non-molars

PC3

premolars vs. non-premolars

PC4

mandibular teeth vs. maxillary teeth

PC5

2nd molars vs. mandibular 1st molars

PC6

mandibular premolars and 2nd molars vs. mandibular 1st molar and maxillary molars and 2nd premolar

PC7

maxillary premolars and mandibular molars vs. maxillary molars and mandibular premolars

PC8

complex contributions

PC9

complex contributions

PC10

right vs. left mandibular molars

FA

FAC1

posterior teeth: premolars and molars

FAC2

maxillary anterior teeth: incisors and canines

FAC3

mandibular canines and premolars

FAC4

maxillary premolars

FAC5

mandibular incisors and canines

FAC6

non-occlusal premolar and molar surfaces, maxillary lateral incisors, and maxillary canines

FAC7

tooth 20 (left mandibular 2nd premolar)

FAC8

tooth 29 (right mandibular 2nd premolar)

FAC9

maxillary 2nd molars

FAC10

tooth 13 (left maxillary 2nd premolar)


See Additional file 1 for full details

Shaffer et al. BMC Oral Health 2012 12:7   doi:10.1186/1472-6831-12-7

Open Data