Create older people indicators dataframe for visual impairment from survey data collected using the standard RAM-OP questionnaire.

Create older people indicators dataframe for visual impairment from survey data collected using the standard RAM-OP questionnaire.

Usage

create_op_visual(svy)

Arguments

svy

A dataframe collected using the standard RAM-OP questionnaire

Value

A tibble of older people indicators on visual impairment

Visual impairment by "Tumbling E" method

The "Tumbling E" method is described in:

Taylor HR (1978). Applying new design principles to the construction of an illiterate E Chart. Am J Optom & Physiol Optics 55:348

poorVA

Poor visual acuity (correct in < 3 of 4 tests)

Author

Mark Myatt

Examples

# Create visual impairment indicators dataset from RAM-OP survey data
# collected from Addis Ababa, Ethiopia
create_op_visual(testSVY)
#> # A tibble: 192 × 4
#>      psu  sex1  sex2 poorVA
#>    <int> <dbl> <dbl>  <dbl>
#>  1   201     0     1      0
#>  2   201     1     0      1
#>  3   201     1     0      0
#>  4   201     0     1      0
#>  5   201     0     1      0
#>  6   201     1     0      0
#>  7   201     1     0      1
#>  8   201     0     1      1
#>  9   201     1     0      1
#> 10   201     0     1      1
#> # ℹ 182 more rows