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Table 3 Linear regression analysis of the association between diet quality indices and nutrient intakes in Iranian households (n = 6935)

From: A comparison of diet quality indices in a nationally representative cross-sectional study of Iranian households

Nutrients

Overall

Mean (SD)

HEI

DQI-I

β - Coeff

95% CI

P-valuea

β - Coeff

95% CI

P-valuea

Energy (kcal/day)

2636 (695)

      

Protein (% energy)

11.0 (1.75)

0.08

0.07, 0.09

< 0.001

0.09

0.08, 0.09

< 0.001

Fat (% energy)

24.6 (7.49)

0.26

0.23, 0.29

< 0.001

− 0.30

− 0.32, − 0.28

< 0.001

Sodium (mg/day)

2264 (2566)

− 80.8

− 90.0, − 71.7

< 0.001

− 42.1

− 49.9, − 34.4

< 0.001

Fibre (g/day)

11.9 (4.92)

0.13

0.11, 0.15

< 0.001

0.31

0.29, 0.32

< 0.001

Iron (mg/day)

15.0 (5.02)

0.04

0.02, 0.06

< 0.001

0.32

0.31, 0.33

< 0.001

Calcium (mg/day)

594 (247)

12.5

11.6, 13.4

< 0.001

17.1

16.5, 17.7

< 0.001

Vitamin C (mg/day)

62.2 (49.3)

3.67

3.51, 3.82

< 0.001

2.9

2.8, 3.1

< 0.001

  1. Abbreviations: HEI Healthy Eating Index, DQI-I; Diet quality index international
  2. aAssociations between diet quality indices (continuous independent) and nutrient intakes (continuous dependent) were examined by using Wald tests of associations for linear regression