Table 2 Patient factors and the odds of having kidney stone (n = 9932)

Age—year

 35–44

1

1

 45–54

1.17 (1.04–1.32)

1.04 (0.92–1.19)

 55–64

1.37 (1.21–1.54)

1.10 (0.95–1.28)

 ≥ 65

1.51 (1.26–1.82)

1.15 (0.93–1.42)

Gender

 Female

1

1

 Male

1.38 (1.26–1.52)

1.57 (1.39–1.76)

Alcohol consumption

 No

1

1

 Yes

1.18 (1.03–1.34)

1.12 (0.96–1.31)

Cigarette smoking

 No

1

1

 Yes

1.05 (0.94–1.16)

0.80 (0.70–0.93)

Hookah smoking

 No

1

1

 Yes

1.22 (1.08–1.37)

1.16 (1.02–1.32)

Opium consumption

 No

1

1

 Yes

1.14 (1.02–1.26)

1.02 (0.88–1.17)

Drinking of purified water in lifetime

 Yes

1

1

 No

1.33 (1.21–1.46)

1.20 (1.08–1.35)

Hypertension

 No

1

1

 Yes

1.48 (1.33–1.64)

1.33 (1.18–1.50)

BMI

 < 25

1

1

 25–29.9

1.24 (1.11–1.40)

1.24 (1.11–1.40)

 ≥ 30

1.25 (1.11–1.41)

1.30 (1.14–1.48)

Diabetes mellitus

 No

1

1

 Yes

1.45 (1.29–1.61)

1.26 (1.12–1.43)

WSI

 Low

1

1

 Low-middle

1.16 (1.02–1.32)

1.14 (1.01–1.30)

 Middle-high

1.23 (1.09–1.40)

1.25 (1.10–1.42)

 High

1.09 (0.95–1.25)

1.08 (0.94–1.25)