title: Ocular biometric parameters among 3-year-old Chinese children: testability, distribution and association with anthropometric parameters.
abstract: This survey was conducted to determine the testability, distribution and associations of ocular biometric parameters in Chinese preschool children. Ocular biometric examinations, including the axial length (AL) and corneal radius of curvature (CR), were conducted on 1,688 3-year-old subjects by using an IOLMaster in August 2015. Anthropometric parameters, including height and weight, were measured according to a standardized protocol, and body mass index (BMI) was calculated. The testability was 93.7% for the AL and 78.6% for the CR overall, and both measures improved with age. Girls performed slightly better in AL measurements (P = 0.08), and the difference in CR was statistically significant (P < 0.05). The AL distribution was normal in girls (P = 0.12), whereas it was not in boys (P < 0.05). For CR1, all subgroups presented normal distributions (P = 0.16 for boys; P = 0.20 for girls), but the distribution varied when the subgroups were combined (P < 0.05). CR2 presented a normal distribution (P = 0.11), whereas the AL/CR ratio was abnormal (P < 0.001). Boys exhibited a significantly longer AL, a greater CR and a greater AL/CR ratio than girls (all P < 0.001).
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Huang
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Xuejuan
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Gong
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Chaoqun
authors.initials: C
authors.lastname: Yuan
authors.affiliation: Maternal and Child Healthcare Hospital of Yuhua District, Nanjing, 210012 China.
authors.forename: Hui
authors.initials: H
authors.lastname: Ding
authors.affiliation: Maternal and Child Healthcare Hospital of Yuhua District, Nanjing, 210012 China.
authors.forename: Jing
authors.initials: J
authors.lastname: Bai
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Zhujun
authors.initials: Z
authors.lastname: Fu
authors.affiliation: Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Rongbin
authors.initials: R
authors.lastname: Yu
authors.affiliation: Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
authors.forename: Hu
authors.initials: H
authors.lastname: Liu
mesh_terms: D044466:Asian People; D058452:Axial Length, Eye / Q000000981:diagnostic imaging / Q000502:physiology*; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007368:Interferometry / Q000379:methods; D016014:Linear Models; D008297:Male; D015351:Vision Screening / Q000379:methods*