Table 2 Univariate and multivariate logistic regression models for the relation of DII score to urinary risk factors of kidney stone formation

Hypercreatininuria

 T1

1

1

1

1

 T2

1.62 (0.88–3.01)

0.92 (0.45–1.89)

0.85 (0.41–1.78)

0.84 (0.38–1.85)

 T3

7.60 (3.28–17.61)

3.10 (1.23–7.81)

2.80 (1.10–7.12)

2.21 (0.78–6.28)

 P value for trend

≤ 0.001

0.02

0.04

0.19

Hypocitraturia

 T1

1

1

1

1

 T2

1.60 (0.81–3.17)

1.53 (0.75–3.11)

1.69 (0.82–3.49)

1.16 (0.55–2.44)

 T3

6.04 (2.35–15.55)

5.64 (2.10–15.15)

5.84 (2.14–15.91)

3.40 (1.17–9.86)

 P value for trend

≤ 0.001

0.001

≤ 0.001

0.03

Hyperoxaluria

 T1

1

1

1

1

 T2

1.34 (0.72–2.48)

1.47 (0.77–2.79)

1.63 (0.84–3.16)

1.46 (0.74–2.88)

 T3

0.86 (0.47–1.58)

0.99 (0.52–1.90)

1.12 (0.57–2.19)

0.87 (0.41–1.83)

 P value for trend

0.64

0.95

0.78

0.69

Hyperuricosuria

 T1

1

1

1

1

 T2

1.69 (0.92–3.12)

1.08 (0.55–2.13)

1.20 (0.59–2.42)

0.94 (0.45–1.95)

 T3

4.40 (2.16–8.94)

2.14 (0.98–4.67)

2.22 (1.001–4.95)

1.35 (0.56–3.24)

 P value for trend

≤ 0.001

0.06

0.05

0.53

Hypercalciuria

 T1

1

1

1

1

 T2

1.34 (0.72–2.51)

1.13 (0.59–2.18)

1.02 (0.52–2.00)

0.96 (0.48–1.91)

 T3

10.45 (3.84–28.39)

8.11 (2.88–22.83)

7.44 (2.62–21.14)

6.22 (2.06–18.77)

 P value for trend

≤ 0.001

≤ 0.001

≤ 0.001

0.003