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KMID : 0351219740060010059
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Korean Journal of Infectious Diseases
1974 Volume.6 No. 1 p.59 ~ p.72
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Morbidity Patterns of Malaria, Typhoid Fever and Infectious Hepatitis among Korean Physicians During the Last 60 Years. A Cohort Approach
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Abstract
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Using Korean physician population, morbidity patterns of Malaria, Typhoid Fever and Infectious Hepatitis during the last 60 years were studied. Deta were collected applying the postal survey method from the 9,036 Korean physicians registered to the Korean Medical Association in 1972. Data were analyzed by age, sex, year of birth and by calendar year, and various rates such as experience rates, incidence rates, were computed adopting the cohort concept.
Followings are brief summary of the study.
Malaria
The total experience rates for malaria were 35.8% in male and 23.5% in female. The older the age the higher was the experience rates in both sexes. The incidence distribution by age shows unimodal curve with the sharp peak at the age of 10-14. The birth-cohort shows the sharpest drop in the incidence rates between those born in 1935-1939 and in 1940-1944. The secular trend shows marked gradual decrease in incidence rates from 1910 to 1949, however during the Korean War the incidence rates increased markedely and then from 1960, the sharp downward trend was observed.
Typhoid Fever
16.2% of Korean physicians have experienced the typhoid fever in the past. The experience rates for male (17.0%) was higher than that of female (10.3%). The older the age the higher was the experience rates. The incidence curve shows unimodal distribution with the peak at the ages of 10-14. Therafter, the incidence rates decrease very slowly by the progress of age. The birth-cohort shows, in general, the younger the age the lower the incidence rates, however, the distributions of incidence rates by cohorts fluctuate. The secular trend by calendar year shows slow decrease in incidence rates from 1910 to 1930 and then increase up to 1950. Thereafter, the incidence rates decreases very rapidly. However, for the recect 10 years, the degree of the
recent`years is 0 2%:
epstltis _
Itie expeneflce .rates of the disease-among male andrfemale-were 4.6% and 2.7%; respectively.
mss`´ ` The´very sharp peak of incidence´ ,disfribufion wad obsirvbd at tine ages =of - 25--=29, however another small -peak was also seen in ages of 10--14 with the lover rate -for male than female. A slight decrease in incidence rates in children was observed, However, the´ incidence rates in adult showed no change.
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