Correlation analysis further indicated that sputum total IgE levels were significantly correlated with asthma control scores (Figure 2A; r = 0.53, P < 0.001), blood Eos% (Figure 2B; r = 0.25, P = 0.029), FeNO (Figure 2C; r = 0.51, P < 0.001), and sputum Phadiatop (Figure 2H; r = 0.59, P < 0.001). Here, IGHE is linked to asthma.