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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.
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