Table 1 Description of the screened population: prevalence of nominal risk factors in the general screened population and by sex (as expressed in % and absolute number n of the total subjects, of females and of males respectively) scalar parameters (mean ± SD)

Sex

100 %

n =7305

83.7 %

n =6114

16.3 %

n =1191

Family history of osteoporosis

25.2 %

n =1839

26.2 %

n =1605

19.6 %

n =234

Previous fracture

18.3 %

n =1335

18.2 %

n =1115

18.4 %

n =220

Underweight

8.6 %

n =626

8.7 %

n =535

7.6 %

n =91

Steroids

11.6 %

n =849

11.8 %

n =725

10.4 %

n =124

Rheumatoid Arthritis

6.6 %

n =485

6.8 %

n =416

5.7 %

n =69

Nephrolithiasis^a

5.5 %

n =193

5.8 %

n =175

3.5 %

n =18

Hyperthyroidism^a

2.8 %

n =100

2.9 %

n =89

2.15 %

n =11

Early menopause^b

-

23.9 %

885

-

Amenorrhea > 12 months

-

7.3 %

446

-

Ovariectomy by age 50

-

6.8 %

418

-

Alcohol consumption

4.4 %

n =323

3.1 %

191

11.1 %

132

Smoking habit

37.9 %

n =2772

35.1 %

2151

52.1 %

621

Exercise < 30 min/day

19.0 %

n =1390

19.1 %

1169

18.5 %

221

Avoiding dairy products

15.8 %

n =1157

25.6 %

979

15.0 %

178

Exposure to sunlight

24.3 %

n =1777

25.6 %

1564

17.9 %

213

Crohn disease^a

0.2 %

n =6

0.2 %

n =5

0.2 %

n =1

Celiac disease^a

0.6 %

n =22

0.7 %

n =20

0.4 %

n =2

Rectocolitis ulcerosa^a

0.3 %

n =12

0.3 %

n =10

0.4 %

n =2

Secondary osteoporosis^a

3.9 %

n =138

4.1 %

n =124

2.7 %

n =14

Age (years)

58.3 ± 12.4

57.6 ± 12.0

62.00 ± 13.6

BMI^a

24.6 ± 4.01

24.42 ± 4.2

25.86 ± 3.5

Menopause age (years)^b

-

49.41 ± 8.4

-

Pregnancies (number)

-

1.29 ± 1.1

-

Lactation (months)

-

8.63 ± 44.8

-

HRT (months)^b

-

5.75 ± 20.2

-

Smoking (pack/years)

5.9 ± 11.07

5.26 ± 10.4

10.17 ± 16.8

Mean QUS T-score

−0.98 ± 4.04

−1.13 ± 4.4

−0.23 ± 4.6

Mean QUS Z-score

0.17 ± 2.01

0.07 ± 1.9

0.67 ± 3.2

Mean FRAX-A score^a (% value)

7.87 ± 7.09

8.22 ± 8.3

5.79 ± 4.6

Mean FRAX-B^a score (% value)

3.04 ± 5.09

3.14 ± 6.2

2.43 ± 3.7

Prevalence of QUS T-score < −2.5

18,1 %

1212

20,2 %

1128

7,4 %

84

Prevalence of QUS Z-score < −2.5

1,1 %

76

1 %

58

1,6 %

18

Prevalence of FRAX-A score <10 %

77 %

2710

75,4 %

2266

87,1 %

444

Prevalence of FRAX-B score <3 %

75,8 %

2653

75,7 %

2264

76,3 %

389