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Table 2 Age-standardized incidence and mortality rates of NPC per 100,000 during different time periods and the Estimated Annual Percent Changes (EAPC) in Sihui and Cangwu

From: Trends in incidence and mortality of nasopharyngeal carcinoma over a 20–25 year period (1978/1983–2002) in Sihui and Cangwu counties in southern China

  Period EAPC (p value)
  1978–82 1983–87 1988–92 1993–97 1998–2002  
Incidence Rate (number of cases)       
Sihui       
   Male 28.07 (167) 28.68 (205) 28.65 (235) 28.03 (268) 30.94 (284) +1.73% (0.215)
   Female 12.29 (91) 14.79 (111) 13.35 (116) 11.81 (116) 13.00 (117) -1.12% (0.739)
Cangwu       
   Male   17.81 (209) 18.68 (225) 19.43 (259) 19.76 (280) +3.57% (0.020)
   Female   7.44 (82) 6.91 (78) 7.23 (68) 7.33 (96) 0.00 (0.998)
Mortality Rate (number of cases)       
Sihui       
   Male 24.42 (143) 20.49 (141) 20.65 (166) 19.56 (182) 21.95 (195) -2.56% (0.413)
   Female 10.47 (80) 9.43 (73) 8.95 (76) 9.01 (89) 7.73 (70) -6.32% (0.016)
Cangwu       
   Male   12.53 (137) 18.38 (213) 18.41 (227) 15.00 (201) +5.56% (0.622)
   Female   4.97 (54) 6.27 (71) 7.26 (87) 4.73 (61) -0.019% (0.999)