progression {vfprogression}

general progression function

Description

progression returns the progression criterion with four methods. plr.nouri.2012, vfi, schell2014, cigts

Usage

progression(vfseries, method = c("plr.nouri.2012", "vfi", "schell2014",
  "cigts"))

Arguments

vfseries

is a data frame. MUST contain the following columns: yearsfollowed', and 'eyeid'. Rows represent the single measurements. Other requirements, such as number of minimum measurements (rows), and necessary VF measurements could be found in each progression method's documentation

method

selected from one or more from: plr.nouri.2012, vfi, schell2014, cigts. Default it ...

Value

"stable", "worsening", or "improving" of measurements in measmatrix

See Also

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4495761/

Examples

data(vfseries)
progression(vfseries)
progression(vfseries[vfseries$eyeid == 1,])
progression(vfseries[vfseries$eyeid == 2,])
progression(vfseries, method=c("cigts"))