19 urements were determined in children. Compani- sons have been made between the numbers exam- ined each year. Excluding those who wereshifted into the adult study, the total over-all attrition rate between 1958 and 1959 was 10%. Of the 18 children not seen in 1958 but examinedin 1959, 14 were babies born in the interval between the two examinations. The age distribution of children examinedin 1959 was as follows: Age, yr 4to9 210 Total 19 15 34 Table 7 30 26 26 82 20 Incidence of Chronic Impetigo (Active) ? ? ? 60 6 9 The occurrence of various medical conditions is summarized in Table 6. There seemed to be no concentration of clinical abnormalities in the ex- posed groups. Since the incidence of manyofthese conditions could have been related to the ages of the children at the time of examination, two of the most frequent findings, active chronic impetigo and palpable liver over 3 cm in size, were tabulated separatelyfor several different age groups (Tables 7 and 8). The ages were based on the best available birth date estimations. A tendency for these findings to occur more frequently in the younger children was noted. The incidences, how- ever, did not appearto be related to exposure to radiation. During the physical examinations, the following congenital anomalies were recorded: Patent ductusarteriosus (repaired) 1 (Subject +896) Bifid uvula i (Subject #2269) 1 (Subject #2265) In addition, the incidence of congenital hypoplasia of the middle phalanx ofthe fifth finger was determined from inspection of the roentgenograms of the left hand. Theincidencein relation to varlous exposure categories was as follows: Incidence Exposed, Rongelap Nonexposed with exposed parents Nonexposed, Rongelap 2/33 0/4 5/53 Nonexposed, Majuro 0/14 Utirik (low exposure) <4 Exposed 5/51 4-9 3210 Total 7/19 3/15 10/34 Nonexposed with exposed parents Nonexposed, Rongelap 7/20 13/30 Nonexposed, Majuro 7/26 5/26 0/6 0/9 7/20 25,82 0.15 Table 8 Incidence of Palpable Liver (Over 3 cm} Age, yr <+ Exposed Nonexposed with exposed parents Nonexposed, Rongelap Nonexposed, Majuro 1 (Subject +805) Deformity of the hip Pectus excavatum Age, yr Id 2/20 6/30 4-9 3210 Total 3/19 G/15 5,34 3/26 16 0/26 1/9 2,20 11/82 2/15 Table 9 Pediatric Dispensary Visits During 1959 Survey Presenting complaint Cough Back or limb pain Skin sores Otitis Diarrhea Anorexia Headache Worms Loss of hearing Laceration Abdominalpain Numberofpatients — Nonexposed, Majuro Uurik 20 st Nonexposed, Rongelap BO Nonexposed with exposed parents eee Exposed eo <4 Hypoplasia of the middle phalanx has beenreported as occurring in the normal population in incidences ranging from 0.5% to 5.2%. The anomaly was found to have considerably greaterfrequency (25%) in Japanese children.** The over-all incidence in the Marshallese children was 0.77%. Pediatric dispensary work was carried outpreceding andfollowing the regular examinations. In all, 36 children were treated. The presenting complaints are shown in Table 9.