node . population between 100 and 499, and 10 had a population of 500 or more. In chis latter group were Saipan, Babelthuap, Yap, Noror, Majuro, and Kwajalein, all wich over 1,000 inhabirants. Area was no indication of population. ee ee In terms of size, some of the larger islands were very sparsely populated. . Tinian and Rota, . for instance, while nearly as Jarge as Saipan, had much smaller popuIntions. On some of the tinyislands with an area of Jess than 1 square mile, the population density was far greater than on the larger islands. Population density in terms of over-all area was misleading in numevous instances for. on manyof the larger islands, only a very small area was inhabitable. This was especially true ou the volcanic islands where much of the island was too rocky to be inhabited. The result was a concentration of population in a very smal) area with an extremely high population densitr. while the rest of the island had few or no inhabitants at all? Table 1 shows by district the numberof females visibly pregnant at the time of the health survey. Estimated annual birth rates based on these figures are alsoshown. For comparative purposes, in the United States in 1949 birth rates per 1,000 estimated female population, between the ages of 15 to 44, were as follows: all races, 105.2; white, 102.6: and nonwhite, 126.4. Age distribution. The median age for the three districts combined was 23.0. Over one third of the population was under 15 years of Table l. Females 15 to +f vears of age cisibly pregnant on day of surrey Population examined. Total : Sapan district | | | | Falsu district MMarshatl Islands district Number Total Feroales 15 to 44 years of aze cower = —- + Females prepmant on day of sorvey 146 4, 138 406 4.999 1, Oe} 119 | 10, 55 6,573 152 135 2416 Annaal birth rate per 1,000° Total Females 15 to 44 years of age 244 130.8 7 sh2 | 19.2 83.9 ard 262, *Estimated on basis that all preetsacies Will tertoinate in live births. Rates computed by relating tatal pregnancies of day of survey to population and mulltiplytng by 4.4. 1202 9013254 . VOLUME 10, NO. 10 spate U. 3. ARMED FORCES MEDICAL JOURNAL dyed Preah ted em, =. * * . . : coete . ey — tae He et ee dle aoh a gee Oe ~ etage be eg ve Mie 3. Ws oth |