A retrospective survery and data processing on 204 patients (130 females, 65 males) with leprosis was performed on Hai Ba Trung District of Ha Noi City. The incidence increased from the year 1955 to 1965 and decreased progressively from the year 1966 to 1995. Male patients had got the rate of 68,14%, female 31,68%. Age group of 16-25 accounted for 15,68%. The onset of disease earlier, in female subjects began from the age of 11 to 15 with high rate - 13,8%, over the age 50, higher than in male by 4,62%. Male at the age of 16-20, the onset of disease of male was late than female, increased gradually with the rate of 17,27% at the age 20-25 years old.
Epidemiology ; Retrospective Studies ; Leprosy ; Age Factors

From May to November 2001, among 32 241 patients met 3 772 who had allergic dematology inflamation of many causes, 35 of them contacted cosmetics. In general, 91.43% of the patients are women and 8.57% are men, 51.4% range from 20-29 years old of age. 62.86% are state servants and students. 68.6% of the patients were affected after contacting cosmetic for one year. 65.71% are affected on the face and 37.14% had an antecedent of allergy.
Epidemiology ; Allergic ; Cosmetics

From January 1999 to December 1999, after the dematology check on 4372 patients in 4 factories and enterprices in Ha Noi: the Hanoi Paint Factory, the Sao Vang Rubber Factory, Van Dien Battery Factory and Hanoi Weaving Factory showed that: The percentage of dematology associated with ocupation was 11.39%, the highest percentage is in the Hanoi Paint Factory: 20.39%, the lowest is in the Sao Vang Rubber Factory 4.99%. The most common regions are open regions (on the face: 19.77 - 45.33%); on the limbs: 16.00% - 36.97%; on the hands: 18.49% - 27.76%. The most common work experience: from 11 to 25 years, 98% of the patients have allergy.
Epidemiology ; Dermatitis, Occupational ; Occupational Diseases