Table 3 Multivariable-adjusted odds ratios (95% CIs) for kidney stone across quartile categories of PDI score.

From: A cross-sectional study of the association between plant-based diet indices and kidney stones among Iranian adults

 

Quartiles of PDI

p trend

Q1 (n = 2625)

Q2 (n = 2492)

Q3 (n = 2021)

Q4 (n = 2701)

Kidney stone (n)

399

384

354

476

 

Crude

1.00

1.01 (0.87–1.18)

1.18 (1.01–1.38)

1.19 (1.03–1.38)

0.005

Model 1a

1.00

1.01 (0.87–1.18)

1.19 (1.02–1.40)

1.17 (1.01–1.36)

0.007

Model 2b

1.00

0.99 (0.85–1.16)

1.19 (1.01–1.40)

1.18 (1.01–1.37)

0.007

Model 3c

1.00

0.99 (0.85–1.16)

1.19 (1.01–1.40)

1.17 (1.01–1.37)

0.008

  1. aModel 1: adjusted for age and sex.
  2. bModel 2: further adjusted for place of residence, SES, marital status, education, smoking, alcohol, physical activity, energy, salt intake, water intake, diabetes, high blood pressure, cardiovascular diseases, cancer.
  3. cModel 3: further adjusted for BMI.
  4. PDI plant-based diet index.
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