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Table 1 Characteristics of samples from nasopharyngeal carcinoma (NPC) cases and healthy controls from the four case–control datasets

From: A single nucleotide polymorphism in the Epstein-Barr virus genome is strongly associated with a high risk of nasopharyngeal carcinoma

Dataset Region Period NPC cases Healthy controls Note
Detected/total (no.) Source Detected/total (no.) Source
Data_GD1 Guangdong Oct 2005–Oct 2007 157/346 Sun Yat-sen University Cancer Center (SYSUCC) 319/448 The First Affiliated Hospital of Sun Yat-sen University (1st AH-SYSU) NPC endemic
Data_GD2 Guangdong Oct 2008–Jun 2013 168/222 SYSUCC 241/315 1st AH-SYSU NPC endemic
Data_GD3 Guangdong Oct 2008–Jun 2013 726/1065 Local hospitals in Guangdong province 880/1161 Local hospitals in Guangdong province NPC endemic
Data_SD Shandong Oct 2008–Jun 2013 58/102 The Affiliated Hospital of Qingdao University, the Shandong Province Cancer Center 612/1543 Local hospitals in Shandong province NPC non-endemic