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Table 2 Concurrent criterion validation of dietary indices

From: Use of dietary indices to control for diet in human gut microbiota studies

 

n

HEI

MDS

HFD-index

Men vs women

443:4604

56.4:60.4***

4.2:4.6***

0.2:0.19⊥

Over 60s vs under 60s

2543:2504

59.8:60.3⊥

4.5:4.6**

0.2:0.2⊥

Smokers vs non-smokers

317:2909

55.9:61***

4.1:4.7***

0.16:0.21***

  1. Three dietary indices, the Healthy Eating Index (HEI), the Mediterranean Diet Score (MDS) and the Healthy Food Diversity index (HFD-index) were assessed for their ability to predict difference of diet of smokers vs non-smokers, over 60s vs under 60s, and men vs women via two sample t test (HFD-index via Wilcoxon rank sum). Difference in means is displayed for each grouping, with significance thresholds indicated by: **p < 0.01, ***p < 0.001, ⊥ = non-significant. Results of tests are indicated in Additional file 1: Table S2