Participant | Original format | | New format for SAS PROC PHREG analysis |
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CollectionYear | RuralPractice | StartYear | EndYear | CensorStatus |
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1 | 2011 | No | 0 | 2 | 1 |
1 | 2012 | No | | | |
1 | 2013 | Yes | 2 | 4 | 2 |
1 | 2014 | Yes | | | |
1 | 2015 | No | 4 | 5 | 1 |
- Calendar years were converted to simple time (yearly) units, with 0 indicating (end of) year 2010, and 5 indicating (end of) year 2015
- This was necessary to preserve the correct duration, or the number of years, that the participatnt contributed to the study. For example, the maximum time period in this study is 5 years (2011 through 2015 inclusive). However, 2015–2011 (or in code 5–1) equals 4 years only
- CensorStatus = 1 indicates censoring or a non-event (ie no rural practice). CensorStatus = 2 indicates an event (ie rural practice)
- Grey-shaded rows of data did not exist in the new format