getage

calculates age in years, as durations or periods

There is no ophthalmic researcher who has not had headaches from
the handling of visual acuity entries. Different notations, untidy entries.
This shall now be a matter of the past. Eye makes it as easy as pie to work
with VA data - easy cleaning, easy conversion between
Snellen, logMAR, ETDRS letters, and qualitative visual acuity
shall never pester you again. The eye
package automates the pesky task to count number of patients and eyes,
and can help to clean data with easy re-coding for right and left eyes.
It also contains functions to help reshaping eye side specific variables
between wide and long format. Visual acuity conversion is based on
Schulze-Bonsel et al. (2006) <doi:10.1167/iovs.05-0981>,
Gregori et al. (2010) <doi:10.1097/iae.0b013e3181d87e04>,
Beck et al. (2003) <doi:10.1016/s0002-9394(02)01825-1> and
Bach (2007) <https://michaelbach.de/sci/acuity.html>.

Tjebo Heeren

Analysis of Eye Data

Antoine Fabri

getage function

<dl><dt>from_date</dt>
<dd>start date</dd>
<dt>to_date</dt>
<dd>end date</dd>
<dt>period</dt>
<dd>Calculating period (TRUE) or duration (FALSE- default)</dd>
<dt>dec</dt>
<dd>How many decimals are displayed</dd></dl>

Arguments

Author

getage — getage

<dl>

<dt>from_date</dt>
<dd>start date</dd>


<dt>to_date</dt>
<dd>end date</dd>


<dt>period</dt>
<dd>Calculating period (TRUE) or duration (FALSE- default)</dd>


<dt>dec</dt>
<dd>How many decimals are displayed</dd>

</dl>

getage: getage

Description

Usage

Value

Arguments

Author

See Also

Examples