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Table 2 Association of dietary factors with NPC

From: Traditional Cantonese diet and nasopharyngeal carcinoma risk: a large-scale case-control study in Guangdong, China

Intake frequency * Adulthood Childhood
  Case/Ctrl OR(95%CI)# Case/Ctrl OR (95%CI)#
Salted fish     
   Less than monthly (ref) 1085/1272 1.0 724/1075 1.0
   Monthly 162/80 2.39(1.80-3.17) 236/116 3.04(2.38-3.87)
   Weekly or more 128/98 1.58(1.20-2.09) 415/254 2.45(2.03-2.94)
   P trend   < 0.001   < 0.001
Salted vegetables     
   Less than monthly (ref) 970/1252 1.0 551/962 1.0
   Monthly 218/85 3.31(2.54-4.31) 204/129 2.72(2.13-3.48)
   Weekly or more 190/113 2.20(1.71-2.82) 624/355 3.17(2.68-3.77)
   P trend   < 0.001   < 0.001
Preserved/cured meat     
   Less than monthly (ref) 606/1256 1.0 859/1242 1.0
   Monthly 170/46 7.80(5.33-11.39) 55/49 1.67(1.09-2.54)
   Weekly or more 157/37 9.69(6.39-14.70) 35/27 2.09(1.22-3.60)
   P trend   < 0.001   0.001
Fermented pastes     
   Less than monthly (ref) 1243/1301 1.0 1056/1203 1.0
   Monthly 76/44 1.82(1.24-2.66) 149/80 2.12(1.59-2.82)
   Weekly or more 56/106 0.57(0.41-0.79) 174/164 1.22(0.97-1.54)
   P trend   0.157   0.001
Fresh fruits     
   Less than monthly (ref) 299/234 1.0 1176/797 1.0
   Monthly 138/91 1.22(0.85-1.76) 92/166 0.38(0.28-0.50)
   Weekly or more 936/1126 0.63(0.51-0.77) 106/481 0.12(0.09-0.16)
   P trend   0.157   0.001
  1. * Intake frequency was categorised as follows: less than monthly, < once per month; monthly, once per month to once per week; weekly or more, ≥ once per week.
  2. # OR, odds ratio calculated among matched case and control groups, adjusting for sex, age, education, dialect and household type.