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Outline
This study aimed to characterize the epidemiology of HIV/AIDS through expanded screening to provide evidence for epidemic assessment and response.
Data were obtained from an expanded HIV screening program conducted in a district of Chengdu between 2019 and 2024. After collection and cleaning, datasets were analyzed using Excel 2019 and R 4.5.0. Categorical variables were summarized using frequencies and composition ratios, with between-group differences assessed by chi-square tests. Analyses focused on HIV positivity rates and seroconversion rates.
During the six-year period, the screening program reached 1 025 356 individuals, representing 76.17% of the target population, with a total of 1 901 438 tests performed. A total of 2 419 HIV-positive cases (1 463 cases were infected previously) and 221 seroconversion cases were identified. Most cases were male (75.86% and 69.23%, respectively) and aged 50 years or older (56.72% and 65.16%, respectively). The overall HIV positivity rate (, P<0.001) showed a significant increasing trend, whereas the seroconversion rate showed no significant trend (
, P=0.241). The HIV positivity rate was highest in the 60-69 age group (376.92 per 100 000), while the seroconversion rate was highest in the 50-59 age group (81.56 per 100 000). The seroconversion rate among males was approximately 3.5 times that of females.
The epidemic is characterized by an increasing trend in the overall HIV positivity rate coupled with fluctuating seroconversion rates. Men over 50 years represent a key population at elevated risk, underscoring the need for targeted prevention and screening strategies in this demographic.
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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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