A study on 580 patients at Hong Duc hospital, Hai Phong revealed that: - The general HBsAg (+) ratio of tested patients was: 17.9 percent; - The gender-based HBsAg (+) ratio was 18.6 percent in male patients and 17.2 percent in female patients; - The location-based HBsAg (+) ratio was 20.4 percent in urban districts and 15.2 percent in rural districts; - The age group-based HBsAg (+) ratio was 14.8 percent among patients 20 years old, 17.1 percent among patients of 20-29 years old, 19.5 percent among patients of 30-39 years old, 23.8 percent among patients of 40-49 years old and 7.9 percent among patients of 50-59 years old. - The occupation-based HBsAg (+) ratio was 6.42 percent among students, 26.3 percent among office workers, 26.9 percent among vendors. and traders and 12.4 percent among housewives and retired people. - The education-based HBsAg (+) ratio was 48.3 percent among people having secondary school education, 17.2 percent among people having high school education and 15.3 percent among people having vocational and college education.
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