What is the clinical evidence from this study?

Study design: Observational. Population: Healthy children (fifth-graders) (n=14872). Intervention: Calendar year (1993-2008). Primary outcome: Trend in the 95th percentile of systolic blood pressure (SBP) in boys (Regression coefficient -0.524 mm Hg/year, 95% CI -0.815 to -0.234, p=<0.05).

January 1, 2010Journal of EpidemiologyOpen Access

Trends in Body Mass Index, Blood Pressure, and Serum Lipids in Japanese Children: Iwata Population-Based Annual Screening (1993–2008)

Q: What are the key findings of this study?

From 1993 to 2008, the 95th percentile of systolic blood pressure significantly decreased by 0.52 mm Hg/year in boys and 0.40 mm Hg/year in girls among Japanese fifth-graders.

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Key result

From 1993 to 2008, the 95th percentile of systolic blood pressure significantly decreased by 0.52 mm Hg/year in boys and 0.40 mm Hg/year in girls among Japanese fifth-graders.

Population

14,872 fifth-grade children enrolled in all public schools in the Original Iwata area in Iwata City, Japan…

Design

Cross-sectional

Authors

KKKatsuyasu KoudaKansai Medical University HNHarunobu NakamuraKansai Medical University NNNobuhiro NishioNagoya University

Discussion

Member takes

Implication

Declining upper-tail SBP in Japanese fifth-graders warrants ongoing surveillance; leaves open links to rising underweight and obesity.

Study Design

Type

Observational (n=14,872)

Multicenter

Structured PICO

Population

14,872 fifth-grade children (approximately 10 years old, 48.5% female) from public schools in Iwata, Japan, evaluated in annual population-based health screenings from 1993 to 2008.

Outcome

Secular trends in body mass index (BMI), systolic blood pressure (SBP), diastolic blood pressure (DBP), total cholesterol (TC), non-HDL-C, and HDL-C in relation to the calendar year.surrogate

Main Result

Effect estimate: Regression coefficient -0.524 mm Hg/year (95% CI -0.815 to -0.234)

p-value: p=<0.05

Over a 15-year period in Japanese schoolchildren, systolic and diastolic blood pressures significantly decreased, while the prevalence of both obesity (in boys) and underweight (in both sexes) increased.

Limitations

Data were from only one area of Japan, so subjects were not randomly selected from across the whole country.
Blood pressure measurements were only repeated when the value obtained was greater than the cutoff point, which might have caused underestimation of the mean and 95th percentile due to regression to the mean.
Data were from only 1 area of Japan and subjects were not randomly selected from across the whole country.
Blood pressure measurements were only repeated when the value obtained was greater than the cutoff point, potentially causing regression to the mean and underestimation of the mean and 95th percentile.

Cite This Study

Kouda et al. (2010) conducted an observational in Healthy children (fifth-graders) (n=14,872). Calendar year (1993-2008) was evaluated on Trend in the 95th percentile of systolic blood pressure (SBP) in boys (Regression coefficient -0.524 mm Hg/year, 95% CI -0.815 to -0.234, p=<0.05). From 1993 to 2008, the 95th percentile of systolic blood pressure significantly decreased by 0.52 mm Hg/year in boys and 0.40 mm Hg/year in girls among Japanese fifth-graders.

synapsesocial.com/papers/6a9828f4cfa25b768ec63d25 https://doi.org/10.2188/jea.je20090079

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January 1, 2010Journal of EpidemiologyOpen Access

Trends in Body Mass Index, Blood Pressure, and Serum Lipids in Japanese Children: Iwata Population-Based Annual Screening (1993–2008)

View Full Paper

Ask AI

Bookmark

Key result

From 1993 to 2008, the 95th percentile of systolic blood pressure significantly decreased by 0.52 mm Hg/year in boys and 0.40 mm Hg/year in girls among Japanese fifth-graders.

Population

14,872 fifth-grade children enrolled in all public schools in the Original Iwata area in Iwata City, Japan…

Design

Cross-sectional

Authors

KKKatsuyasu KoudaKansai Medical University HNHarunobu NakamuraKansai Medical University NNNobuhiro NishioNagoya University

Discussion

Member takes

Implication

Declining upper-tail SBP in Japanese fifth-graders warrants ongoing surveillance; leaves open links to rising underweight and obesity.

Study Design

Type

Observational (n=14,872)

Multicenter

Structured PICO

Population

14,872 fifth-grade children (approximately 10 years old, 48.5% female) from public schools in Iwata, Japan, evaluated in annual population-based health screenings from 1993 to 2008.

Outcome

Secular trends in body mass index (BMI), systolic blood pressure (SBP), diastolic blood pressure (DBP), total cholesterol (TC), non-HDL-C, and HDL-C in relation to the calendar year.surrogate

Main Result

Effect estimate: Regression coefficient -0.524 mm Hg/year (95% CI -0.815 to -0.234)

p-value: p=<0.05

Limitations

Data were from only one area of Japan, so subjects were not randomly selected from across the whole country.
Blood pressure measurements were only repeated when the value obtained was greater than the cutoff point, which might have caused underestimation of the mean and 95th percentile due to regression to the mean.
Data were from only 1 area of Japan and subjects were not randomly selected from across the whole country.
Blood pressure measurements were only repeated when the value obtained was greater than the cutoff point, potentially causing regression to the mean and underestimation of the mean and 95th percentile.

Cite This Study

synapsesocial.com/papers/6a9828f4cfa25b768ec63d25 https://doi.org/10.2188/jea.je20090079

Also Consider

Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context:

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