Background.- Since the early 1990s, no study has been undertaken examining the prevalence and burden of headache disorders in China. Objective.- We conducted a one-year survey on the prevalence and burden of primary headache in the Chinese provinces of Guangdong and Guangxi. Our study also evaluated the factors behind similarities and differences affecting prevalence in the 2 regions of study. Methods.- Random samples of 372 local residents in Guangdong and 182 local residents in Guangxi aged 18-65 years were invited to a face-to-face interview. Results.- The one-year prevalence of primary headache was 22.6% (84/372) in Guangdong and 41.2% (75/182) in Guangxi. The prevalence of migraine (14.3%, n = 26) in Guangxi was higher than prevalence of migraine (8.3%, n = 31) in Guangdong (P = .03). The ratio of headache cost and household income was 2.1% in Guangdong and 3.7% in Guangxi, the ratio in Guangdong was less than that in Guangxi (P = .001). The diagnostic confirmation rate of migraine was low. No migraineur used triptans drugs to treat migraine in either region. Conclusion.- Migraine prevalence was higher in the lower-income region that also contains a higher proportion of ethnic minorities. Although there was no difference of headache cost between the 2 regions, the headache populations in the lower-income region would relatively suffer a greater financial burden if taking the economic differences between the 2 regions into account. The improvement of diagnostic and therapeutic levels for the treatment of headache, especially migraine, in the 2 regions may be a matter of urgency.
The dense river network and large population in the southern region of China are vulnerable to flooding stress, which challenges the construction of human settlements. This paper analyzes the causes of flood risk and the dilemma of human settlement improvement in river-network cities, introduces the principle of resilience to human settlements, and conducts a quantitative study on the resilience of human settlements in river-network cities with the goal of flood risk management. Taking Yueyang city, a river-network city in the Yangtze River Basin, as the empirical research object, we conduct a flood resilience zoning of the human settlements based on the flood risk assessment model and use the GIS spatial overlay method to correct the resilience of the current human living space against the territorial spatial planning of Yueyang city. Ultimately, we propose a strategy for optimizing human settlements under flood risk management. The results show that (1) the highest-risk and high-risk areas of Yueyang city were mainly located in Dongting Lake and its interconnected water system, the southwest local area and the southeastern fringe, while the low-risk and lowest-risk areas were mainly located in the northeast local area and the northwestern fringe, with low flood stress risk. (2) The spatial system of human settlement resilience was constructed based on the flood risk assessment level. Among them, the human settlement flood resilience zoning of Yueyang city was divided into five categories from low to high: human settlement control zone, restriction zone, buffer zone, construction zone and expansion zone; the flood resilience zoning of Yueyang city’s current living space was divided into three categories from low to high: structure adjustment zone, flood restriction zone and development stability zone. (3) The specific control implementation and execution of the human settlements in Yueyang city mainly focus on the interrelationship between the risk of flooding in the watershed and the development of human activities through zoning regulation and collaborative management to optimize the human settlements. The study results can provide positive intervention and guidance for constructing urban and rural territorial spatial prevention planning and improving human living quality in river-network cities in China.
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