10.5061/DRYAD.HT357
Langeslag-Smith, Miriam A.
Counties Manukau District Health Board
Vandal, Alain C.
Counties Manukau District Health Board
Briane, Vincent
Counties Manukau District Health Board
Thompson, Benjamin
University of Waterloo
Anstice, Nicola S.
University of Auckland
Data from: Preschool children’s vision screening in New Zealand: a
retrospective evaluation of referral accuracy
Dryad
dataset
2015
preschool children
amblyopia
vision screening
Visual acuity
refractive error
2015-09-24T15:03:00Z
2015-09-24T15:03:00Z
en
https://doi.org/10.1136/bmjopen-2015-009207
83130 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Objectives: To assess the accuracy of preschool vision screening in a
large, ethnically diverse, urban population in South Auckland, New
Zealand. Design: Retrospective longitudinal study. Methods: B4 School
Check vision screening records (n=5572) were compared with hospital eye
department data for children referred from screening due to impaired
acuity in one or both eyes who attended a referral appointment (n=556).
False positive screens were identified by comparing screening data from
the eyes that failed screening with hospital data. Estimation of false
negative screening rates relied on data from eyes that passed screening.
Data were analysed using logistic regression modelling accounting for the
high correlation between results for the two eyes of each child. Primary
outcome measure: Positive predictive value of the preschool vision
screening programme. Results: Screening produced high numbers of false
positive referrals, resulting in poor positive predictive value (PPV=31%,
95% CI 26% to 38%). High estimated negative predictive value (NPV=92%, 95%
CI 88% to 95%) suggested most children with a vision disorder were
identified at screening. Relaxing the referral criteria for acuity from
worse than 6/9 to worse than 6/12 improved PPV without adversely affecting
NPV. Conclusions: The B4 School Check generated numerous false positive
referrals and consequently had a low PPV. There is scope for reducing
costs by altering the visual acuity criterion for referral.
B4SC Visual screening - DataData analysed from B4 School Check vision
screening referrals 1 March 2010 to 28 February 2011Copy of Langeslag et
al - B4SC Visual screening - Data.xlsx