Cough group Cough and SOB group P value Serum IL-17 (pg/ml) 99 (74-167) 117 (83-160) 0.84 Serum IL-9(pg/ml) 26.1 ± 11.9 50± 43 0.02* Serum IgE (IU/ml) 293 (100-605) 241 (97-512) 0.9 Eosinophilic % 1 (1-2) 3 (2-4) 0.002*

SOB: Shortness of breath; IL: Interleukin; pg: Picogram; IgE: Immunoglobulin E. Data are expressed as median (range) and mean ± standard deviation P value based on Mann-Whitney test and independent T-test *Statistical significance was defined as P ≤ 0.05 Table 6: Biochemical markers of cough group versus cough and shortness of breath group.