Figure 1

Flowchart showing participants in the study. ^a27,892 refused in the very beginning of the phone call. ^bMainly after removal of duplicated interviews or excess numbers in certain sample strata. ^cNone of the 70 missing subjects had reported a previous diagnosis of SS or Sicca syndrome. ^dOnly 50% (10/20) of these cases had already been diagnosed with SS prior to the EPISER2016 study.