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To determine the trend of the incidence of Hepatitis B in Chengdu City during 2010 to 2021, and its ecological determinants.
Linear correlations between Hepatitis B incidence and ecological factors was analyzed using the data collected in Chengdu from 2010 to 2021. Principal component analysis was used to eliminate the independent variables’ multicollinearity, and establishing a multivariate linear regression model to determine the ecological predictors of Hepatitis B incidence.
The incidence of Hepatitis B in Chengdu decreased over the period of 2010-2021, from 50.03 per 100 000 to 24.81 per 100 000. multivariate linear regression showed the Results: The incidence of Hepatitis B decreased with the increases of Per capita disposable income(x1/x2) and expenditure on health care for urban/rural residents(x3/x4), per capita expenditure of rural residents on education, culture and entertainment(x5), urbanization rate(x8), per capita residential gross leasable area(x9), birth rate(x10), number of health institutions per 10 000 people(x11), number of health technicians per 10 000 people(x12), number of hospital beds per 10 000 people(x13), average annual relative humidity(x14). While it increased with the increase of urban/rural household Engel’s coefficient(x6/x7)(y=76.514-0.050x1-0.184x2-4.358x3-6.161x4-3.652x5+0.821x6+0.281x7- 0.081x8-0.404x9-1.036x10-0.360x11-0.005x12-0.075x13-0.607x14).
There is a linear relationship between hepatitis B incidence and social economic development, population, health resources and natural environmental factors, which could provide a basis for the prediction of hepatitis B incidence.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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