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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).