Table S1.

The clinical characteristics of patients

Characteristic	Result	Percent (%)
Sex (n)
Male	71	80.3
Female	18	19.7
Age (years)
Median	45	N/A
95% CI	21–75	N/A
Type (n)
WHO III	89	100
Tumor stage (n)
III	47	52.6
IVa	42	47.4

Notes: We collected 71 male and 18 female patients in Sun Yat-Sen University Cancer Center during 2000–2009 who were diagnosed with local advanced tumor, and received radiotherapy later. All of them were pathologically confirmed as nasopharyngeal carcinoma type III with a median age of 45 years.

Abbreviations: WHO, World Health Organization; N/A, not applicable; CI, confidence interval.