About the National Data

Data

Baseline: 4.3 percent of adults 18 years and over with visual impairment used vision rehabilitation services in 2017

Target: 6.2 percent

Numerator
Number of adults aged 18 years and over who have trouble seeing and use any vision rehabilitation services.
Denominator
Number of adults aged 18 years and over who have trouble seeing.
Target-setting method

Projection

Target-setting method details
Linear trend fitted using weighted least squares and a projection at the 25 percent prediction interval.
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Target-setting method justification
Trend data were evaluated for this objective. Using historical data points, a trend line was fitted using weighted least squares, and the trend was projected into the next decade. This method was used because three or more comparable data points were available, the projected value was within the range of possible values, and a projection at the 25 percent prediction interval was selected because it was a statistically significant improvement from the baseline. The Healthy People 2030 Workgroup Subject Matter Experts viewed this as an ambitious yet achievable target due to data trends.

Methodology

Methodology notes

Persons who respond "yes" having trouble seeing and use any vision rehabilitation service meet the criteria for this objective.

History

Comparable HP2020 objective
Retained, which includes core objectives that are continuing from Healthy People 2020 with no change in measurement.

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Because Healthy People 2030 objectives have a desired direction (e.g., increase or decrease), the confidence level of a one-sided prediction interval can be used as an indication of how likely a target will be to achieve based on the historical data and fitted trend.