Table 1 Oxidative balance score assignment scheme

Dietary OBS components

Dietary fiber (g/d)

A

< 12.90

12.90–21.10

≥ 21.10

< 11.00

11.00–18.00

≥ 18.00

β-Carotene (mcg/d)

A

< 463.00

463.00-1780.41

≥ 1780.41

< 468.10

468.10–1993.00

≥ 1993.00

Riboflavin (mg/d)

A

< 1.67

1.67–2.49

≥ 2.49

< 1.32

1.32–1.97

≥ 1.97

Niacin (mg/d)

A

< 20.37

20.37–30.12

≥ 30.12

< 14.79

14.79–21.95

≥ 21.95

Vitamin B6 (mg/d)

A

< 1.58

1.58–2.40

≥ 2.40

< 1.18

1.18–1.84

≥ 1.84

Total folate (mcg/d)

A

< 303.00

303.00-473.00

≥ 473.00

< 241.00

241.00-373.00

≥ 373.00

Vitamin B12 (mcg/d)

A

< 3.03

3.03–5.74

≥ 5.74

< 2.16

2.16–4.20

≥ 4.20

Vitamin C (mg/d)

A

< 32.80

32.80–97.20

≥ 97.20

< 32.91

32.91–89.29

≥ 89.29

Vitamin E (ATE) (mg/d)

A

< 5.78

5.78–9.77

≥ 9.77

< 4.78

4.78–8.12

≥ 8.12

Calcium (mg/d)

A

< 656.29

656.29–1070.00

≥ 1070.00

< 564.00

564.00-916.00

≥ 916.00

Magnesium (mg/d)

A

< 252.29

252.29–361.00

≥ 361.00

< 207.00

207.00-296.00

≥ 296.00

Zinc (mg/d)

A

< 8.73

8.73–13.53

≥ 13.53

< 6.67

6.67–10.07

≥ 10.07

Copper (mg/d)

A

< 1.00

1.00-1.47

≥ 1.47

< 0.83

0.83–1.24

≥ 1.24

Selenium (mcg/d)

A

< 92.20

92.20-136.47

≥ 136.47

< 68.20

68.20-103.80

≥ 103.80

Total fat (g/d)

P

≥ 98.58

63.59–98.58

< 63.59

≥ 74.82

47.92–74.82

< 47.92

Iron (mg/d)

P

≥ 17.41

11.58–17.41

< 11.58

≥ 13.59

8.87–13.59

< 8.87

Lifestyle OBS components

PA (MET-minute/week)

A

< 1200.00

1200.00-4200.00

≥ 4200.00

< 720.00

720–2400.00

≥ 2400.00

Alcohol (g/d)

P

≥ 30

0–30

none

≥ 15

0–15

none

Body mass index (kg/m2)

P

≥ 30.08

26.10-30.08

< 26.10

≥ 31.60

25.90–31.60

< 25.90

Cotinine (ng/mL)

P

≥ 0.161

0.017–0.161

< 0.017

≥ 0.052

0.011–0.052

< 0.011