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Trends in Incidence of Stroke and Transition of Stroke Subtypes in Rural Tianjin China: A Population-Based Study from 1992 to 2012.

Li B, Lou Y, Gu H, Long X, Wang T, Wei J, Wang J, Tu J, Ning X - PLoS ONE (2015)

Bottom Line: The incidence of ischemic stroke has increased and that of hemorrhagic stroke has decreased in urban China; however, the trends in rural areas are unknown.The proportion of intracerebral hemorrhage was stable overall, increased among men aged 45-64 years, and decreased among men aged ≥65 years.The average age of intracerebral hemorrhage in men reduced by 7.5 years from 1992 to 2012.

View Article: PubMed Central - PubMed

Affiliation: Department of Neurology, Tianjin Haibin People's Hospital, Tianjin, China.

ABSTRACT

Objectives: The incidence of ischemic stroke has increased and that of hemorrhagic stroke has decreased in urban China; however, the trends in rural areas are unknown. We aimed to explore the secular trends in incidence and transition of stroke subtypes among rural Chinese.

Methods: This was a population-based stroke surveillance through the Tianjin Brain Study. A total of 14,538 residents in a township of Ji County in Tianjin, China participated in the study since 1985. We investigated the age-standardized stroke incidence (sex-specific, type-specific, and age-specific), the annual proportion of change in the incidence of stroke, and the proportion of intracerebral hemorrhage in the periods 1992-1998, 1999-2005, and 2006-2012, because the neuroimaging technique was available since 1992 in this area.

Results: The age-standardized incidence per 100,000 person-years increased significantly for both intracerebral hemorrhage (37.8 in 1992-1998, 46.5 in 1999-2005, and 76.5 in 2006-2012) and ischemic stroke (83.9 in 1992-1998, 135.3 in 1999-2005, and 238.0 in 2006-2012). The age-standardized incidence of first-ever stroke increased annually by 4.9% for intracerebral hemorrhage and by 7.3% for ischemic stroke. The greatest increase was observed in men aged 45-64 years for both stroke types (P < 0.001). The proportion of intracerebral hemorrhage was stable overall, increased among men aged 45-64 years, and decreased among men aged ≥65 years. The average age of intracerebral hemorrhage in men reduced by 7.5 years from 1992 to 2012.

Conclusion: The age-standardized incidence of main stroke subtypes increased significantly in rural China over the past 21 years; the overall proportion of intracerebral hemorrhage was stable, but the incidence increased significantly among middle-aged men. These findings imply that it is crucial to control stroke risk factors in middle-aged men for stroke prevention in future decades.

No MeSH data available.


Related in: MedlinePlus

Age-standardized incidence of intracerebral hemorrhage and ischemic stroke by gender and age groups from 1992 to 2012 (1/100,000 person-years).The age-standardized incidence increased annually by 4.9% for intracerebral hemorrhage (ICH) and by 7.3% for ischemic stroke (IS). The incidence in those aged 45–64 years increased annually by 11.8% for ICH and by 10.5% for IS (P < 0.001). The incidence of first-ever stroke in those aged ≥65 years remained stable for ICH but increased by 6.2% in IS.
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pone.0139461.g001: Age-standardized incidence of intracerebral hemorrhage and ischemic stroke by gender and age groups from 1992 to 2012 (1/100,000 person-years).The age-standardized incidence increased annually by 4.9% for intracerebral hemorrhage (ICH) and by 7.3% for ischemic stroke (IS). The incidence in those aged 45–64 years increased annually by 11.8% for ICH and by 10.5% for IS (P < 0.001). The incidence of first-ever stroke in those aged ≥65 years remained stable for ICH but increased by 6.2% in IS.

Mentions: Fig 1 depicts the age-standardized incidence of ICH and IS by gender and age. The age-standardized incidence of ICH increased annually by 4.9% (3.7% in men, 5.1% in women), and IS increased annually by 7.3% (6.8% in men, 8.3% in women). The incidence of ICH among those aged 45–64 years increased by 11.8% annually overall and by 9.8% in men; the incidence of IS in those aged 45–64 years increased annually by 10.5% overall, by 10.7% in men, and by 9.9% in women (P < 0.001). The incidence of first-ever stroke among those aged ≥65 years remained stable for ICH, but increased for IS (6.2% overall, 5.1% in men, 7.4% in women annually).


Trends in Incidence of Stroke and Transition of Stroke Subtypes in Rural Tianjin China: A Population-Based Study from 1992 to 2012.

Li B, Lou Y, Gu H, Long X, Wang T, Wei J, Wang J, Tu J, Ning X - PLoS ONE (2015)

Age-standardized incidence of intracerebral hemorrhage and ischemic stroke by gender and age groups from 1992 to 2012 (1/100,000 person-years).The age-standardized incidence increased annually by 4.9% for intracerebral hemorrhage (ICH) and by 7.3% for ischemic stroke (IS). The incidence in those aged 45–64 years increased annually by 11.8% for ICH and by 10.5% for IS (P < 0.001). The incidence of first-ever stroke in those aged ≥65 years remained stable for ICH but increased by 6.2% in IS.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591354&req=5

pone.0139461.g001: Age-standardized incidence of intracerebral hemorrhage and ischemic stroke by gender and age groups from 1992 to 2012 (1/100,000 person-years).The age-standardized incidence increased annually by 4.9% for intracerebral hemorrhage (ICH) and by 7.3% for ischemic stroke (IS). The incidence in those aged 45–64 years increased annually by 11.8% for ICH and by 10.5% for IS (P < 0.001). The incidence of first-ever stroke in those aged ≥65 years remained stable for ICH but increased by 6.2% in IS.
Mentions: Fig 1 depicts the age-standardized incidence of ICH and IS by gender and age. The age-standardized incidence of ICH increased annually by 4.9% (3.7% in men, 5.1% in women), and IS increased annually by 7.3% (6.8% in men, 8.3% in women). The incidence of ICH among those aged 45–64 years increased by 11.8% annually overall and by 9.8% in men; the incidence of IS in those aged 45–64 years increased annually by 10.5% overall, by 10.7% in men, and by 9.9% in women (P < 0.001). The incidence of first-ever stroke among those aged ≥65 years remained stable for ICH, but increased for IS (6.2% overall, 5.1% in men, 7.4% in women annually).

Bottom Line: The incidence of ischemic stroke has increased and that of hemorrhagic stroke has decreased in urban China; however, the trends in rural areas are unknown.The proportion of intracerebral hemorrhage was stable overall, increased among men aged 45-64 years, and decreased among men aged ≥65 years.The average age of intracerebral hemorrhage in men reduced by 7.5 years from 1992 to 2012.

View Article: PubMed Central - PubMed

Affiliation: Department of Neurology, Tianjin Haibin People's Hospital, Tianjin, China.

ABSTRACT

Objectives: The incidence of ischemic stroke has increased and that of hemorrhagic stroke has decreased in urban China; however, the trends in rural areas are unknown. We aimed to explore the secular trends in incidence and transition of stroke subtypes among rural Chinese.

Methods: This was a population-based stroke surveillance through the Tianjin Brain Study. A total of 14,538 residents in a township of Ji County in Tianjin, China participated in the study since 1985. We investigated the age-standardized stroke incidence (sex-specific, type-specific, and age-specific), the annual proportion of change in the incidence of stroke, and the proportion of intracerebral hemorrhage in the periods 1992-1998, 1999-2005, and 2006-2012, because the neuroimaging technique was available since 1992 in this area.

Results: The age-standardized incidence per 100,000 person-years increased significantly for both intracerebral hemorrhage (37.8 in 1992-1998, 46.5 in 1999-2005, and 76.5 in 2006-2012) and ischemic stroke (83.9 in 1992-1998, 135.3 in 1999-2005, and 238.0 in 2006-2012). The age-standardized incidence of first-ever stroke increased annually by 4.9% for intracerebral hemorrhage and by 7.3% for ischemic stroke. The greatest increase was observed in men aged 45-64 years for both stroke types (P < 0.001). The proportion of intracerebral hemorrhage was stable overall, increased among men aged 45-64 years, and decreased among men aged ≥65 years. The average age of intracerebral hemorrhage in men reduced by 7.5 years from 1992 to 2012.

Conclusion: The age-standardized incidence of main stroke subtypes increased significantly in rural China over the past 21 years; the overall proportion of intracerebral hemorrhage was stable, but the incidence increased significantly among middle-aged men. These findings imply that it is crucial to control stroke risk factors in middle-aged men for stroke prevention in future decades.

No MeSH data available.


Related in: MedlinePlus