CONTENTS Beta Irradiation of the Skin....”....... vee ceneees settee coe ete beset bo ceeventeneceeetete f seeeteteeeeavenees Internal Irradiation....000000 00 ee bee be ceaeeeeeceseeseetiteesestnte ceteneeretees Other Studies... 0..0000.06 0 ec ce ce rete tee Other Background Information .............0-..- tee tees Lk cattte seeeeeneeneees wate ee tetera ceeteteteee Comparison Populations......0.000000000 ci ee ee ORGANIZATION... 00... bee eee eee bnteee se teen ee ates The 1965 Survey 0 oe ce te tee Se bce ceeteene Nh tee ceeeeeeeentes ceeeeecreseteteteeee ce ceteteetseteees ce cee cere eeeeeenenees WwW beeen Penetrating Radiation 2.00.00 0... eee oe Www SummaryOF PasT FINDINGS...00000 000000 0c tee eee eee e tevteenteeeee ceeeeenees DD Lee nee eens te tees ownmn INTRODUCTION..0...00 ccc oe tee eteeseeeteeeenee eens cee ceaeeeecaneeeeeeceetaeeeseseetereees The 1966 Survey. 0.00.00. cee cg eee cee eee ee erent cers tee retenae peeenateres FINDINGS..00000. 000000 ee cecteeeteesneeacceeeeeeeeensetnrees cuenee cee teense tense c ceee tuaeens seeeeesereeeeeernes Interval Medical History ............ 00.0 ce ee eee teetceetteettee ceetteeteees Thnesses..... oe cee eee ceeenee ceeetee ceeetteeseeenes seteens . Deaths... i ee eeceeteee eet ceeneennee teers fb cette ceeteentts fo teeeetruentieeete senneeente wes Births ooo iccccccccccccccecceccecccenesscveteee seceeess sevens Geeeeeenpe se ee ga sevenensrs seatevaeeeseenestee sesteeeses Congenital Anomalies... 000.0 00 oc eee ce ee cree Sex Ratio... cc eee ceesetereee ne Miscarriages and Stillbirths... 000000 00 ec ce ee cette ttt eteneeeeeneees Vital Statistics on the Utirik People... ccc) eee ee cette ce eeteeeec eens eseeneteeeateeneeneeens Physical Examinations ...0.0..0.00.0.00000 00.0 cece ceececeeeeeeeeeeeeetete ce te cette ee senses che Adult Examinations.....0000000.000 occ ccceceeeccectenteeeeee teeeeuseeeeeeses veeeraeeees sees te centeeseetseenaviererrteteyceteenea Pediatric Examinations 0.00.00... cee ee Thyroid Findings... cccccecceene cents ceeeee ceeteee e cusseetscense o ceeesseceatie sesseereeeseeaees The Radiation Dose to the Thyroid Glands...0.0.0.00.0000 oo ccc eter net etetettenetnnnte Previous Thyroid Studies........ Protein-Bound lodine.........0....:ce cence seeeesnteeeees . Dietary Iodine and Urinary Excretion ofIodine. .. Thyroid Uptake of Radiojodine 0.0. 000. ce ec ce cece ceteeee ce etetteeteeeeseeeeaeeeees Serum Cholesterol... cece ceeeeecneeeteeeee cere tenttenseeceeees Discussion of Previous Thyroid Studies... 0000 cece eeceeeetene enters Development of Thyroid Abnormalities. 0.0.00... occ cee cece ec cccceeeeeeteeen ceneeteeeceeteesesneneeas iil 24