Fig. 3From: Deterioration in saliva quality in patients with Sjögren’s syndrome: impact of decrease in salivary epidermal growth factor on the severity of intraoral manifestationsChanges in the salivary flow rate and salivary epidermal growth factor (EGF) output according to the disease duration. a Short-duration Sjögren’s syndrome (SS) group. b Long-duration SS group. (1) Changes in the salivary flow rate. (2) Changes in the salivary EGF output. Statistical analysis was performed using the Wilcoxon signed-rank test. *p < 0.05; n.s., not significantBack to article page