title: Factors affecting development of motor skills in extremely low birth weight children.
abstract: OBJECTIVE
  The aim of this study is to analyze the impact of ophthalmic and neonatal factors on motor development in extremely low birth weight (ELBW) children.
  
  
  METHODS
  Sixty-four ELBW children at least 3 years of age were recruited. Visual acuity (VA) was assessed using the Teller acuity cards (TACs) and a letter test, if possible. A validated questionnaire assessing 25 fine (part A) and 20 gross motor (part B) skills was administered to the parents. Data were collected on retinopathy of prematurity (ROP) zone, intraventricular haemorrhage (IVH), length of stay in hospital, and number of days on oxygen.
  
  
  RESULTS
  Abnormal TAC acuity was associated with significantly lower scores on both parts A and B (part A: 21.5 versus 11.8, p < 0.001; part B: 17.5 versus 13.2, p < 0.001). Linear regression demonstrates a significant direct relationship between letter acuity and score A only (p = 0.03, r(2) = 0.179). Neither length of hospital stay, number of days ventilated, nor a history of IVH were associated with score A or B. However, the presence of ROP zone 1 was associated with a lower score A (p = 0.03).
  
  
  CONCLUSIONS
  In this ELBW cohort VA and ophthalmic factors were the only factors associated with scores of development, particularly fine motor development.
authors.affiliation: Directorate of Orthoptics and Vision Science, University of Liverpool, Liverpool, UK. annaoc@liv.ac.uk
authors.forename: Anna R
authors.initials: AR
authors.lastname: O'Connor
authors.forename: Eileen E
authors.initials: EE
authors.lastname: Birch
authors.forename: Rand
authors.initials: R
authors.lastname: Spencer
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D015331:Cohort Studies; D006801:Humans; D052577:Infant, Extremely Low Birth Weight / Q000254:growth & development*; D007231:Infant, Newborn; D016014:Linear Models; D008137:Longitudinal Studies; D009048:Motor Skills; D011446:Prospective Studies; D012178:Retinopathy of Prematurity / Q000503:physiopathology; D014792:Visual Acuity