Table 2.

Clinical characteristics of the SS and non-SS groups. Classification of the SS group by disease duration

	SS: long duration (≥ 5.6 years) (n = 11)	SS: short duration (< 5.6 years) (n = 13)	Non-SS (n = 23)
Disease duration (years)	9.2 ± 1.8*	2.6 ± 1.3	–
Age (years)	63.9 ± 5.9**	53.2 ± 13.0	56.1 ± 17.4
OHIP-14 score (out of 56)	13.9 ± 10.8†	8.6 ± 6.6 (n = 11)	7.1 ± 7.6
Salivary flow rate (mL/10 min)	4.7 ± 2.4***, †††	9.1 ± 5.7††	16.9 ± 5.9

*p < 0.0001 versus the short duration (< 5.6 years) group, **p < 0.01 versus the short duration (< 5.6 years) group, ***p < 0.05 versus the short duration (< 5.6 years) group, ^†p < 0.05 versus the non-SS group, ^††p < 0.001 versus the non-SS group, ^†††p < 0.0001 versus the non-SS group