Objective: This study aimed to investigate the relationship between birth order and stereoacuity among Chinese children aged 60-72 months.
Design: Cross-sectional.
Participants: 1342 children with complete data on the questionnaire, stereoacuity and refraction were included.
Results: The mean stereoacuity was 53.2±1.7, 56.9±1.9 and 60.9±1.5 s of arc in the first-born group, second-born group and third-born group, respectively. Lower birth order was significantly correlated with better stereoacuity (p=0.036). Third-borns (OR=3.02, p=0.027) were at higher risk of having subnormal stereoacuity compared with first-borns in the multivariate analysis.
Conclusion: Later-borns had poorer stereoacuity than first-borns.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7552866 | PMC |
| http://dx.doi.org/10.1136/bmjopen-2019-032833 | DOI Listing |
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