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The age-sex pyramid is a demographic tool which shows patterns of change in the age structure and sex ratio of an area over time. Its name comes from the traditional pyramid shape of an area which indicates a lot of children in large families, with a lower life expectancy and relatively few elderly. This shape is quite rare in developed nations like Australia. As nations and areas transition over time this shape turns into a column where there are less children a mix of ages including many elderly. Older areas with a lot of retirees or relatively few births may have a "reverse" pyramid formation where the largest proportion of the population is at the top of the chart.
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Sex Workers Film Series: GAI SHANXI AND HER SISTERS | The Clinton Street Theater

The age-sex pyramid is a demographic tool which shows patterns of change in the age structure and sex ratio of an area over time. Its name comes from the traditional pyramid shape of an area which indicates a lot of children in large families, with a lower life expectancy and relatively few elderly. This shape is quite rare in developed nations like Australia. As nations and areas transition over time this shape turns into a column where there are less children a mix of ages including many elderly. Older areas with a lot of retirees or relatively few births may have a "reverse" pyramid formation where the largest proportion of the population is at the top of the chart. The sex ratio of males to females can also be seen - young areas are likely to have more males, while elderly areas generally have more females due to longer life expectancy.
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Knowledge of sexually transmitted diseases and condom use among female street sex workers in Padua

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Objectives: The aim of the present study was to investigate knowledge of sexually transmitted diseases STDs and condom use in a population of young female street sex workers from eastern Europe and other non-EU countries based in the Padua area north-eastern Italy. To assess whether any aspects of their behavior might foster the spread of STDs. Study design: Street sex workers prostitutes were approached on the streets or during non-STD medical appointments, their knowledge of STDs and condom use were evaluated. They were asked to answer an anonymous questionnaire comprising 16 questions.
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