Dataset Information

Axial length elongation in primary school-age children: a 3-year cohort study in Shanghai.

ABSTRACT:

Objective

To investigate the axial length (AL) elongation in primary school-age children during 3-year follow-up period and evaluate the associations of AL elongation with spherical equivalent (SE), AL at baseline, body height and weight.

Design

A 3-year observational cohort study from 2014 to 2017.

Setting

Jinshan Hospital of Fudan University in Shanghai.

Methods

A total of 452 children successfully completed their measurements in the 3-year follow-up period. The mean age of those children was 6.9±0.7 years, ranging from 6 to 8 years, and 217 (42.7%) were boys. AL was measured with an ocular biometry system. Refractive error was measured using an auto-refractor without cycloplegia.

Results

The mean changes of ALs were 0.27±0.28 mm, 0.52±0.40 mm and 0.89±0.51 mm over 1, 2 and 3 years, respectively. The mean changes of SEs were -0.27±0.80 D, -0.56±1.00 D and -0.95±1.41 D over 1, 2 and 3 years, respectively. Multivariate linear regression analysis revealed that mean change of AL was associated with mean change of SE at all points (all p<0.001). In addition, linear regression analysis revealed that AL elongation in the 3year follow-up period was associated with AL at baseline (R²=0.009, p=0.045).

Conclusions

AL elongation is relatively high in the primary school-age children in Jinshan District, Shanghai. Effect strategies are needed to control AL elongation.

SUBMITTER: Li T

PROVIDER: S-EPMC6830838 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Publications

Axial length elongation in primary school-age children: a 3-year cohort study in Shanghai.

Li Tao T Jiang Bo B Zhou Xiaodong X

BMJ open 20191031 10

<h4>Objective</h4>To investigate the axial length (AL) elongation in primary school-age children during 3-year follow-up period and evaluate the associations of AL elongation with spherical equivalent (SE), AL at baseline, body height and weight.<h4>Design</h4>A 3-year observational cohort study from 2014 to 2017.<h4>Setting</h4>Jinshan Hospital of Fudan University in Shanghai.<h4>Methods</h4>A total of 452 children successfully completed their measurements in the 3-year follow-up period. The me ...[more]

PMID: 31676647

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Project description:IntroductionThere are few reports on the beliefs about thirdhand smoke in Chinese families with primary school children. This study aims to understand the beliefs about thirdhand smoke among parents or grandparents of primary school children in Shanghai and to provide an evidence base to incorporate thirdhand smoke preventative action into tobacco control interventions.MethodsWe performed a cross-sectional survey among parents and grandparents of children aged 6-13 years in the Changjiang Road Primary School and recruited 843 participants to make assessments on the 'beliefs about thirdhand smoke' (BATHS) scale. Sociodemographic details including age, gender, marital status, education level, personal income and type of home ownership (new house, secondhand house with or without redecoration) and health status of children (whether they suffered from respiratory diseases or not) were investigated. Scale assessment, univariate and multivariate analyses to explore the factors influencing the BATHS scale and subscale scores, were performed using SPSS version 22.0.ResultsParticipants who were aged >65 years were more likely to get lower scores on the BATHS scale (OR=0.476; 95% CI: 0.311-0.728, p=0.001). Undergraduates (OR=1.190; 95% CI: 1.020-1.388, p=0.027) and graduates (OR=1.4490; 95% CI: 1.102-1.906, p=0.008) obtained higher scores. Moreover, the scores of residents living in a secondhand house with redecoration (OR=0.882; 95% CI: 0.782-0.995, p=0.041) and without redecoration (OR=0.801; 95% CI: 0.698-0.919, p=0.002) were lower compared with those of new-house owners. The scores for participants whose children suffered from respiratory diseases in the past six months (OR=1.104; 95% CI: 1.003-1.216, p=0.043) were higher than those whose children had no respiratory diseases.ConclusionsThis study shows that younger people, females, those with higher incomes, and higher education levels, were more likely to believe the thirdhand smoke impacts on health and its persistence in the environment. Our findings can guide targeted actions for smoke-free home interventions.

Dataset Information

Axial length elongation in primary school-age children: a 3-year cohort study in Shanghai.

Objective

Design

Setting

Methods

Results

Conclusions

Publications

Axial length elongation in primary school-age children: a 3-year cohort study in Shanghai.

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