Table 4

Comparison of the performance of the van Bijsterveld and OSS scores for evaluation of keratoconjunctivitis sicca in all participants with complete data (n=646) and all patients classified as having Sjögren's Syndrome (SS) by either or both sets of criteria

	van Bijsterveld score (+)*		Δ
	Positive	Negative	Δ
All participants (n=646)
OSS^†
Positive	277	152	152 (23.5%) p<1×10⁻⁶
Negative	0	217	152 (23.5%) p<1×10⁻⁶
All SS (n=303)
OSS^†
Positive	173	69	69 (22.7%) p<1×10⁻⁶
Negative	0	61	69 (22.7%) p<1×10⁻⁶

*van Bijsterveld score=AECG scoring system for keratoconjunctivitis sicca (lissamine green+fluorescein) which is positive if ≥4 out of 9 possible points.24
†OSS=Ocular Staining Score (lissamine green+fluorescein) for evaluation of keratoconjunctivitis sicca according to the ACR criteria. It is positive if ≥3 out of 12 possible points.23
AECG, American–European Consensus Group.