Objective: The purpose of this study was to evaluate the correlation between each variable on occupational condition and foot deformity by Harris mat footprint.

Method: Subjects were 227 labors having no neurologic or musculoskeletal problems. They were evaluated by clinical history and Harris mat footprint. Three optional parameters of footprints were medial arch angle, metatatarsal arch grade, and hallux valgus angle.

Results: 1) Hallux valgus angles were significantly increased in group of female, above 39 years old, labor, and duration of duty more than 6 years. 2) Medial arch angles were signifi-

cantly decreased in female, above 39 years old, obese person, and labor. 3) Metatarsal arch grades were significantly increased in group of female, above 39 years old, and more than 20 numbers of conveyance, less than 6 years of duration of duty. Foot pain was not related to medial arch angle, metatatarsal arch grade, and hallux valgus angle, respectively.

Conclusion: These results suggest that deformity of foot were related to female, above 39 years old, obese person, position of duty, duration of duty, and standing time. So these peoples maybe helpful for weaning proper modified shoes. (J Korean Acad Rehab Med 2002; 26: 187-192)

Objective: Purposes of this study were to measure the optional five kinds of parameters in children's footprint, to seek what parameters are significant to follow the change of the children's feet and to get the values of normal ranges in children aging from 9 to 72 months.

Method: Subjects were 286 children (572 feet) having no neurologic or musculoskeletal problems. They were divided into seven groups according to age. Five optional parameters of footprint are medial arch angle, lateral concave ratio, angle between transverse axis and long axis, fifth metatarsal angle, and angle between long axis and fifth metatarsal line.

Results: 1) Medial arch angles were significantly increased from 10.03^o (group I) to 41.23^o (group VII). 2) Lateral concave ratios were significantly increased from 31.75% (group I) to 61.48% (group VII). 3) Angles between long and transverse axes were not significantly different. 4) Fifth metatarsal angles were significantly increased from 83.00^o (group I) to 91.04^o (group VII). 5) Angles between long axis and fifth metatarsal line were not significantly changed.

Conclusion: These results suggest that three components-the medial arch, the transverse axis and the fifth metatarsal line-were considered to be available parameters to follow the development of feet. And it is also proposed that our values of their normal range will be helpful to detect abnormalities of children's developing feet.

Objective: The purpose of this study was to evaluate the difference for each variable on plain radiologic study of the foot between weighted and non-weighted routine plain anterior-posterior and lateral views in flatfoot children diagnosed by Harris mat footprint.

Method: Both feet of thirty-four children over two-year old, who had been diagnosed as flatfooted by modified Rose' classification using Harris mat footprint were included. We studied plain roentgenogram images, including anterior-posterior and lateral views, in both standing (weighted) and sitting (non weighted) position of the feet of the patients. We measured the following variables; arch height (AH), calcaneal pitch (CP), talocalcaneal angles from lateral view (TCALA) and anterior-posterior view (TCAAP), talo-first metatarsal angles from the lateral (TFML) and anterior-posterior view (TFMA).

Results: Each variable revealed no significant difference between boys and girls (p＞0.05); neither was there any significant difference noted in each parameter between the right and left feet (p＞0.05). All the variables of plain foot roentgenogram on weighted state were significantly different from the data of non-weighted state, except TCAAP (p＜0.05). CP was the only parameter which showed significant difference according to severity of flatfoot by modified Rose'classification.

Conclusion: Because most of the flatfoot in childhood is hypermobile type, it is necessary to take plain radiologic studies of the feet both in weighted and non weighted state and to compare both data of each variable. In addition, it is prefer to use plain radiologic study of foot both in weighted and non weighted state with footprint as the screening method of pediatric flatfoot lesions.