Table 1 Characteristics among 2855 participants according to status of OP

N

1803

786

266

-

OA (%)

26.8

34.2

30.1

0.01

Age (years)

50.6 ± 6.3

54.4 ± 7.4

59.5 ± 6.8

<0.001

Female (%)

36.5

45.5

86.5

<0.001

BMI (kg/m²)

24.7 ± 3.4

24.3 ± 3.1

23.6 ± 3.1

<0.001

Overweight (%)

44.0

38.3

30.5

<0.001

Smoking (%)

28.1

25.2

7.9

<0.001

Alcohol drinking (%)

42.1

32.3

16.2

<0.001

Mean total energy intake (kcal/d)

1664.1 ± 774.2

1600.7 ± 732.4

1408.4 ± 546.6

<0.001

Mean Ca intake (kcal/d)

507.9 ± 346.0

492.6 ± 308.4

431.8 ± 253.8

<0.001

Ca supplementation (%)

24.3

28.4

47.0

<0.001