Table 3.
Intrasubject variability of the vBS and the OSS in 20 subjects evaluated at two time points with a median gap of 5.5 years
| Subject | Year of Evaluation | Time Gap, y | vBS (Call) | OSS (Call) | Classification Item Change | |||
|---|---|---|---|---|---|---|---|---|
| First | Second | First | Second | First | Second | |||
| Same rater for both evaluations | ||||||||
| 1 | 2010 | 2017 | 7 | 7 (+) | 5 (+) | 9 (+) | 7 (+) | No change |
| 2 | 2010 | 2017 | 7 | 2 (−) | 1 (−) | 4 (−) | 1 (−) | No change |
| 3 | 2012 | 2017 | 5 | 5 (+) | 5 (+) | 6 (+) | 7 (+) | No change |
| 4 | 2013 | 2017 | 4 | 3 (−) | 3 (−) | 4 (−) | 3 (−) | No change |
| 5 | 2013 | 2017 | 4 | 5 (+) | 6 (+) | 6 (+) | 7 (+) | No change |
| 6 | 2015 | 2017 | 2 | 0 (−) | 0 (−) | 0 (−) | 0 (−) | No change |
| 7 | 2015 | 2017 | 2 | 6 (+) | 7 (+) | 7 (+) | 7 (+) | No change |
| 8 | 2015 | 2017 | 2 | 4 (+) | 0 (−) | 5 (+) | 0 (−) | Pos to neg |
| 9 | 2015 | 2017 | 2 | 4 (+) | 2 (−) | 5 (+) | 2 (−) | Pos to neg |
| Different rater for each evaluation | ||||||||
| 1 | 2008 | 2017 | 9 | 3 (−) | 1 (−) | 4 (−) | 2 (−) | No change |
| 2 | 2008 | 2017 | 9 | 2 (−) | 3 (−) | 2 (−) | 6 (+) | Neg to pos |
| 3 | 2009 | 2017 | 8 | 0 (−) | 1 (−) | 0 (−) | 1 (−) | No change |
| 4 | 2009 | 2017 | 8 | 3 (−) | 7 (+) | 3 (−) | 9 (+) | Neg to pos |
| 5 | 2009 | 2017 | 8 | 5 (+) | 1 (‐) | 6 (+) | 2 (−) | Pos to neg |
| 6 | 2009 | 2017 | 8 | 5 (+) | 3 (−) | 5 (+) | 3 (−) | Pos to neg |
| 7 | 2010 | 2017 | 7 | 9 (+) | 9 (+) | 11 (+) | 10 (+) | No change |
| 8 | 2011 | 2017 | 6 | 9 (+) | 7 (+) | 9 (+) | 9 (+) | No change |
| 9 | 2011 | 2017 | 6 | 9 (+) | 7 (+) | 9 (+) | 9 (+) | No change |
| 10 | 2014 | 2017 | 3 | 9 (+) | 3 (−) | 11 (+) | 3 (−) | Pos to neg |
| 11 | 2015 | 2017 | 2 | 7 (+) | 3 (−) | 9 (+) | 3 (−) | Pos to neg |
Abbreviation: ACR/EULAR, American College of Rheumatology/European League Against Rheumatism; neg, negative ocular staining; OSS, Ocular Staining Score; pos, positive ocular staining; vBS, van Bijsterveld score.
The cutoff values for the vBS and the OSS are based on the ACR/EULAR classification criteria 5.
Subjects whose ocular criterion changed between the two time points.
Items went from a positive (abnormal) score to a negative (normal) one.