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Table 2 Correlation analysis between five-year survival time and dietary factors

From: Dietary quality and its structural relationships among equivalent income, emotional well-being, and a five-year subjective health in Japanese middle-aged urban dwellers

  Correlation coefficients Points
Dietary content   
Fresh milk and milk products 0.056** 5point: Almost everyday
Green vegetables 0.045** 4point: 5 ~ 6 days/week
Yellow vegetables 0.045** 3point: 3 ~ 4 days/week
Potatoes 0.039** 2point: 1 ~ 2 days/week
Fresh fruits 0.039** 1point: Almost not eating
Meats 0.032*  
Principle food groups diversity score 0.060*** 6 ~ 30point
Seaweeds 0.030n.s  
Soybean products 0.027n.s  
Fresh fish and shellfish 0.009n.s Out of score
Small fish 0.006n.s  
Eggs −0.017n.s  
Eating behavior   
Desirable eating behavior   
Preparing a meal by myself 0.048**  
Obtaining diet and nutrition information 0.039* 1point: Yes
Consuming diversity foods 0.038* 0point:No
Having a meal at a fixed time 0.036*  
Using supplement frequently 0.033*  
Undesirable eating behavior   
A lot of food likes and dislikes −0.076** 1point: No
Skipping a meal frequently −0.060** 0point: Yes
Having a poor appetite frequently −0.048**  
Eating behavior score 0.065** 0 ~ 8point
Eating between meals frequently 0.026n.s  
Trying to losing weight 0.020n.s  
Knowing optimal dietary content and quantity 0.013n.s  
Eating outside frequently −0.029n.s Out of score
Using cooked and instant food frequently −0.026n.s  
Taking enough time for a meal −0.007n.s  
Having optimal dietary quantity −0.005n.s  
  1. Kendall’s tau rank correlation analysis * p < 0.05, ** p < 0.01, *** p < 0.001, n.s non-significant
  2. Cronbach’s coefficient α: Principle food groups diversity score (0.727), Eating behavior score (0.470)