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Table 4 Multivariate analyses of dietary factors*

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

Dietary Factors OR# 95%CI P-value
Salted fish in childhood    
   Less than monthly(ref) 1.00   
   Monthly 2.42 1.65-3.54 < 0.001
   Weekly or more 1.57 1.16-2.13 0.003
Salted vegetables in childhood    
   Less than monthly(ref) 1.00   
   Monthly 1.28 0.87-1.89 0.215
   Weekly or more 1.81 1.37-2.40 < 0.001
Salted vegetables in adulthood    
   Less than monthly(ref) 1.00   
   Monthly 2.23 1.46-3.40 < 0.001
   Weekly or more 1.79 1.19-2.68 0.005
Fresh fruits in childhood    
   Less than monthly(ref) 1.00   
   Monthly 0.31 0.20-0.47 < 0.001
   Weekly or more 0.13 0.09-0.18 < 0.001
Preserved and cured meat in adulthood    
   Less than monthly(ref) 1.00   
   Monthly 8.32 5.46-12.69 < 0.001
   Weekly or more 12.39 7.60-20.19 < 0.001
Herbal tea habit    
   Less than monthly(ref) 1.00   
   Monthly 0.35 0.27-0.47 < 0.001
   Weekly or more 0.57 0.41-0.78 0.001
Slow-cooked soup habit    
   Less than monthly(ref) 1.00   
   Monthly 0.44 0.21-0.93 0.031
   Weekly or more 0.49 0.37-0.65 < 0.001
  1. *Logistic regression model was built by a stepwise forward method with inclusion criteria p ≤ 0.01.
  2. Both of the dietary consumptions in childhood and adulthood were used in the multivariate analysis.
  3. #OR, odds ratio calculated among matched case and control groups, adjusting for sex, age, education, dialect and household type.