Table 1.
Comparison of dry eye syndrome (DES) and comparison groups concerning later development of Sjögren’s syndrome (SS) with respect to characteristic demographics.
| Variable | DES Patients (n = 48,704) | Comparison Group (n = 128,542) | p Value | ||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Age, median ( IQR a) | 49.8 (10) | 48.7 (15) | |||
| Gender | <0.01 * | ||||
| Male | 14,543 | 29.9 | 43,624 | 33.9 | |
| Female | 34,161 | 70.1 | 84,918 | 66.1 | |
| SS | 2329 | 4.8 | 1927 | 1.5 | <0.0001 ** |
| Observation duration (days, median, IQR a) | 1418 | 781–2316 | 1641 | 971–2512 | <0.001 ** |
a IQR: Interquartile range; * Indicates p < 0.01; ** Indicates p < 0.001.