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.

Method: Twenty children with mild spastic diplegic cerebral palsy and fourteen normal children over 7 years old participated in this study. The foot was divided into 7 portions and then foot contact area, pressure of each foot portion and pathway of center of pressure (COP) were measured and analyzed by F-scan system (Tekscan Inc., USA)

Results: In children with cerebral palsy, first metatarsal area (MET1) showed the highest relative impulse followed by MET2/3, hindfoot and hallux. Relative impulse of hallux, MET1 and medial midfoot were significantly higher in cerebral palsied than in normal children, while that of hindfoot was significantly lower in cerebral palsied than in normal children. Anteroposterior ratio of COP and gait velocity were significantly lower in cerebral palsied than in normal children.

Conclusion: The characteristics of foot pressure distribution and the pathway of COP in children with mild spastic diplegic cerebral palsy were identified by quantitative analysis by F-scan system. Foot scan could be used for evaluating the foot pathology in children with cerebral palsy during gait. (J Korean Acad Rehab Med 2003; 27: 33-37)