Table 2.

The associations between clinical tests and two potential biochemical markers.

Clinical Tests		SS-DED		Non-SS-DE
		MMP-9	MMP-9/LF	MMP-9	MMP-9/LF
OSDI score	β	−1.07	−0.30	0.29	0.15
	ρ	−0.39	−0.20	0.25	0.25
	p value	0.27	0.58	0.49	0.49
NIKBUT first (s)	β	8.64	−2.59	−5.56	−1.65
	ρ	0.13	−0.09	−0.50	−0.66
	p value	0.72	0.80	0.14	0.04 *
Central TMH (mm)	β	−945.3	−432.6	−368.0	−84.2
	ρ	−0.49	−0.20	−0.57	−0.42
	p value	0.15	0.57	0.08	0.22
BN redness score	β	84.7	46.7	13.7	21.9
	ρ	0.56	0.73	0.16	0.47
	p value	0.09	0.02 *	0.67	0.17
Mean redness score	β	142.8	29.0	−13.2	12.7
	ρ	0.95	0.59	0.16	0.18
	p value	3 × 10−5 *	0.07	0.66	0.61

β is the slope of equation of simple liner regression between a clinical test and a biochemical marker. ρ is the Spearman’s correlation coefficient. p value < 0.05 was recognized as a statistically significant correlation (*) and p value < 0.1 was highlighted in bold. Abbreviation: SS, Sjögren syndrome. DED, dry eye disease. OSDI, ocular surface disease index. NIKBUT first, non-invasive keratographic first break-up time. TMH, tear meniscus height. BN, bulbar nasal.