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Preschool children's vision screening in New Zealand: a retrospective evaluation of referral accuracy.

Langeslag-Smith MA, Vandal AC, Briane V, Thompson B, Anstice NS - BMJ Open (2015)

Bottom Line: Screening produced high numbers of false positive referrals, resulting in poor positive predictive value (PPV=31%, 95% CI 26% to 38%).Relaxing the referral criteria for acuity from worse than 6/9 to worse than 6/12 improved PPV without adversely affecting NPV.There is scope for reducing costs by altering the visual acuity criterion for referral.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Counties Manukau District Health Board, Auckland, New Zealand.

No MeSH data available.


Related in: MedlinePlus

Bland-Altman analysis of unaided visual acuity (UVA) of the right eye of children screened as part of the B4 School Check (Parr Vision Test) who attended the ophthalmology department where UVA was measured with the Keeler logMAR Test. The solid black line represents the average difference between these two measures (in logMAR), while the dashed black lines show the 95% confidence limits of agreement between the two measures.
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BMJOPEN2015009207F2: Bland-Altman analysis of unaided visual acuity (UVA) of the right eye of children screened as part of the B4 School Check (Parr Vision Test) who attended the ophthalmology department where UVA was measured with the Keeler logMAR Test. The solid black line represents the average difference between these two measures (in logMAR), while the dashed black lines show the 95% confidence limits of agreement between the two measures.

Mentions: There was poor agreement between UVA measured at vision screening using the Parr Chart and UVA measured at the hospital eye department using the Crowded Keeler (n=495) or Crowded Kay Picture tests (n=56). Figure 2 shows the level of agreement between UVA measurements made using the Parr Chart and the Crowded Keeler logMAR test (mean difference in UVA=−0.08±0.16 logMAR; t=−10.97, p<0.0001). Wide 95% limits of agreement (−0.39 to+0.23 logMAR) suggested the two measures did not produce equivalent results in the same cohort of children. As only a small proportion of children had UVA measured with the Crowded Kay Pictures test they were not included in the Bland-Altman analysis.


Preschool children's vision screening in New Zealand: a retrospective evaluation of referral accuracy.

Langeslag-Smith MA, Vandal AC, Briane V, Thompson B, Anstice NS - BMJ Open (2015)

Bland-Altman analysis of unaided visual acuity (UVA) of the right eye of children screened as part of the B4 School Check (Parr Vision Test) who attended the ophthalmology department where UVA was measured with the Keeler logMAR Test. The solid black line represents the average difference between these two measures (in logMAR), while the dashed black lines show the 95% confidence limits of agreement between the two measures.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4663450&req=5

BMJOPEN2015009207F2: Bland-Altman analysis of unaided visual acuity (UVA) of the right eye of children screened as part of the B4 School Check (Parr Vision Test) who attended the ophthalmology department where UVA was measured with the Keeler logMAR Test. The solid black line represents the average difference between these two measures (in logMAR), while the dashed black lines show the 95% confidence limits of agreement between the two measures.
Mentions: There was poor agreement between UVA measured at vision screening using the Parr Chart and UVA measured at the hospital eye department using the Crowded Keeler (n=495) or Crowded Kay Picture tests (n=56). Figure 2 shows the level of agreement between UVA measurements made using the Parr Chart and the Crowded Keeler logMAR test (mean difference in UVA=−0.08±0.16 logMAR; t=−10.97, p<0.0001). Wide 95% limits of agreement (−0.39 to+0.23 logMAR) suggested the two measures did not produce equivalent results in the same cohort of children. As only a small proportion of children had UVA measured with the Crowded Kay Pictures test they were not included in the Bland-Altman analysis.

Bottom Line: Screening produced high numbers of false positive referrals, resulting in poor positive predictive value (PPV=31%, 95% CI 26% to 38%).Relaxing the referral criteria for acuity from worse than 6/9 to worse than 6/12 improved PPV without adversely affecting NPV.There is scope for reducing costs by altering the visual acuity criterion for referral.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Counties Manukau District Health Board, Auckland, New Zealand.

No MeSH data available.


Related in: MedlinePlus