HP and infectious otitis media: The haptoglobin baseline value of the DSS group (0.38 mg/mL (0.26–0.55) was higher than for the other groups (NC group, 0.17 mg/mL (0.14–0.35); P = 0.043 compared with the DSS group, and AOM group, 0.17 mg/mL (0.06–0.23); P = 0.006 compared with the DSS group).