Table 3. Infection rate head and neck cancer patients treated with different treatment modality.

Variables	Infection event	Infection rate	P-value*
With cetuximab (n = 158)			0.581
Surgery+Chemotherapy+Radiotherapy (n = 76)	14	18.4
Chemotherapy/Chemotherapy+Radiotherapy (n = 82)	18	22.0
Without cetuximab (n = 925)			0.261
Surgery+Chemotherapy+Radiotherapy(n = 486)	54	11.1
Chemotherapy/Chemotherapy+Radiotherapy(n = 439)	39	8.9

^*P value of Pearson’s chi-square test between the cetuximab group v.s without cetuximab group is <0.001.