According to a report on October 14, the British newspaper reported that according to the latest data released by the Chinese government, breast cancer is the most common cancer among Chinese women. Data analysis shows that from 2000 to 2013, the average annual growth rate of breast cancer in China was about 3.5%, while the United States decreased by 0.4% during the same period.
According to a report published on the UK’s “Isle of Independents†website on October 13, the analysis also showed that the incidence of breast cancer in urban areas in China is higher than in rural areas. The higher the population density, the higher the incidence. For small cities (under 500,000 population), the incidence of breast cancer is 30 per 100,000 women. For a medium-sized city (population between 500,000 and 1 million), there are 40 people per 100,000 people, and for large cities (population over 1 million people), there are 60 people per 100,000 people. Have breast cancer.
According to the report, with the rapid development of China's economy, more and more people are moving from rural areas to urban areas and many large cities have emerged. Urbanization may have a major impact on the incidence of breast cancer in China. Listed some of the factors that may be related to the increase in the incidence of breast cancer in China:
Fertility
Having more than one child reduces the risk of breast cancer. The study also showed that women who were 35 years of age or younger at the time of their first child's birth usually had protective effects from pregnancy. However, in China, many women choose to have late childhood because of work stress and cultural changes.
In addition, women do not tend to choose breastfeeding as they once did, which may be another influencing factor. Studies have shown that pregnancy and breastfeeding reduce the risk of breast cancer in women because it reduces the number of menstrual cycles in women's lifetime, and women therefore secrete less estrogen. (Estrogen stimulates the growth of breast cancer cells.) Another hypothesis is that breast cells need to mature to produce milk, while mature cells are less likely to become cancerous cells.
pressure
Larger cities are more likely to experience greater stress, and stress has always been associated with increased risk of developing cancer. Although stress may not directly lead to cancer, it does affect the levels of various hormones and inhibit the immune system. Moreover, once the cancer begins to develop, the pressure is believed to accelerate its progress.
lifestyle
In modern China, women often perform less physical activity than previous generations. A study published in the Journal of International Behavioral Nutrition and Sports reported that between 1991 and 2011, the level of physical activity in Chinese adults fell by nearly half, and women fell faster than men.
In Chinese cities, the problem of unhealthy diets has become more common. Fast-food restaurants have mushroomed rapidly after springing up, which has led to an increase in the obesity rate among Chinese women.
Hormone:
A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control. Many hormones, such as neurotransmitters, are active in more than one physical process.
Endocrine:
Pertaining to hormones and the glands that make and secrete them into the bloodstream through which they travel to affect distant organs. The endocrine sites include the hypothalamus, pituitary gland, pineal gland, thyroid, parathyroids, heart (which makes atrial-natriuretic peptide), the stomach and intestines, islets of Langerhans in the pancreas, the adrenal glands, the kidney (which makes renin, erythropoietin, and calcitriol), fat cells (which make leptin). the testes, the ovarian follicle (estrogens) and the corpus luteum in the ovary). Endocrine is as opposed to exocrine. (The exocrine glands include the salivary glands, sweat glands and glands within the gastrointestinal tract.)
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