Table 4 Association between plant-based diet indices and breast cancer by BMI category

BMI less than 25 kg/m²

PDI

T₁ (≤ 91)

8/13

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (92–105)

11/28

0.638

0.208–1.963

0.434

0.461

0.130–1.641

0.232

T₃ (≥ 106)

4/21

0.310

0.077–1.237

0.097

0.179

0.025–1.269

0.085

hPDI

T₁ (≤ 91)

13/19

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (92–105)

8/23

0.508

0.174–1.482

0.215

0.504

0.149–1.706

0.271

T₃ (≥ 106)

2/20

0.146

0.029–0.735

0.020

0.113

0.017–0.760

0.025

uPDI

T₁ (≤ 94)

4/24

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (95–105)

12/24

3.000

0.847–10.631

0.089

3.960

0.888–17.665

0.071

T₃ (≥ 106)

7/14

3.000

0.744–12.094

0.122

4.762

0.873–25.965

0.071

BMI more than 25 kg/m²

PDI

T₁ (≤ 91)

43/73

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (92–105)

33/58

0.966

0.546–1.708

0.905

1.181

0.636–2.195

0.598

T₃ (≥ 106)

34/70

0.825

0.473–1.439

0.497

1.216

0.618–2.395

0.571

hPDI

T₁ (≤ 91)

45/61

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (92–105)

34/75

0.615

0.351–1.075

0.088

0.719

0.394–1.313

0.283

T₃ (≥ 106)

31/65

0.646

0.364–1.150

0.138

0.571

0.304–1.074

0.082

uPDI

T₁ (≤ 94)

38/74

Ref.

Ref.

Ref.

Ref.

Ref.

Ref.

T₂ (95–105)

24/64

0.730

0.396–1.345

0.313

0.953

0.341–1.250

0.198

T₃ (≥ 106)

48/63

1.484

0.863–2.552

0.154

1.240

0.657–2.340

0.507