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Table 1 10-years incidence of osteoarthritis in hip, knee, and hand (in 2004).

From: Obesity and osteoarthritis in knee, hip and/or hand: An epidemiological study in the general population with 10 years follow-up

All (n = 1675)

Hip (N = 83)

Knee OA (N = 114)

Hand OA (N = 71)

BMI

   

   < 20 (n = 133)

3 (2.3)

7 (5.3)

8 (6.0)

   20 – 25 (n = 918)

47(5.1)

45 (4.9)

36 (3.9)

   26–30 (n = 504)

28 (5.6)

49 (9.7)

20(4.0)

   > 30 (n = 87)

5 (5.7)

11 (12.6)

7 (8.0)

   Missing cases (n = 33)

-

-

-

Gender

   

   Male (n = 732)

28 (3.8)

45 (6.1)

18 (2.5)

   Female (n = 943)

55 (5.8)

69 (6.8)

53 (5.6)

Age

   

   1928–1930 (n = 158)

22 (13.9)

26 (16.5)

11 (15.5)

   1938–1940 (n = 312)

31 (9.9)

37 (11.9)

22 (7.1)

   1948–1950 (n = 453)

23 (5.1)

33 (7.3)

27 (6.0)

   1958–1960 (n = 339)

6 (1.8)

10 (2.9)

10 (2.9)

   1968–1970 (n = 413)

1 (0.2)

8 (1.9)

1 (1.4)

Work status

   

   Employed (n = 1277)

51 (4.0)

74 (5.8)

46 (3.6)

   Homeworkers (n = 117)

10 (8.5)

11 (9.4)

10 (8.5)

   Non-employed (n = 53)

2 (3.8)

4 (7.5)

1 (1.9)

   Disability pensioned (n = 86)

12 (14.0)

16 (18.6)

11 (12.8)

   Age pensioned (n = 55)

5 (9.1)

7 (12.7)

3 (5.5)

   Student (n = 76)

1 (1.3)

0

1 (1.3)

   Missing cases (n = 11)

-

-

-

Leisure time physical activities

   

   < 2 hours/week (n = 810)

48 (5.9)

55 (6.8)

32 (4.0)

   2–4 hours/week (n = 606)

36 (5.8)

41 (6.8)

23 (3.8)

   > 4 hours/week (n = 228)

6 (2.6)

12 (5.3)

12 (5.3)

   Missing cases (n = 31)

-

-

-

  1. The results are presented according to body mass index, gender, age, work status, and level of leisure time activities (in 1994) in the general population of Ullensaker, Norway, initially free of rheumatic diseases (OA and RA) in 1994 (number and percentages of rows in parantheses).