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Table 4 Prevalence rates of Osteoarthritis (OA) per site, per country and per definition

From: European Project on Osteoarthritis (EPOSA): methodological challenges in harmonization of existing data from five European population-based cohorts on aging

  65-74 years old
  Germany Italy Netherlands Spain UK
  Definitions based on self-report
Knee OA - 19.2
(17.1-21.3)
n = 1412
23.6
(20.5-26.7)
n = 706
- -
Hip OA - 14.1
(12.3-15.9)
n = 1412
17.4
(14.6-20.2)
n = 706
- -
Hand OA - 15.7
(13.8-17.6)
n = 1411
19.1
(16.2-22.0)
n = 706
- -
Non-specific - 32.3
(29.9-34.7)
n = 1411
41.4
(37.8-45.0)
n = 735
56.2
(50.8-61.6)
n = 326
-
  Definitions based on clinical judgement
Knee OA - 36.7
(34.2-39.2)
n = 1434
- - 18.6
(16.0-21.2)
n = 878
Hip OA - 22.9
(20.7-25.1)
n = 1434
- - -
Hand OA - 33.1
(30.7-35.5)
n = 1433
- - 23.1
(21.1-25.1)
n = 1678
Non-specific 44.7
(41.4-48.1)
N = 830
54.6
(52.0-57.2)
n = 1433
23.7
(20.0-27.4)
n = 510
43.6
(38.2-49.0)
n = 328
29.3
(27.1-31.4)
n = 1688
  Definitions based on radiographic information
Knee OA - 8.6
(6.4-10.8)
n = 647
- - 15.1
(11.4-18.8)
n = 360
Hip OA - 3.5
(2.1-4.9)
n = 641
- - -
Hand OA - 31.0
(26.3-35.7)
n = 375
- - 28.1
(19.3-36.9)
n = 100
  75+ years old
  Germany Italy Netherlands Spain UK
  Definitions based on self-report
Knee OA - 24.3
(22.1-26.5)
n = 1436
31.4
(28.0-34.8)
n = 696
- -
Hip OA - 18.9
(16.9-20.9)
n = 1436
19.1
(16.2-22.0)
n = 696
- -
Hand OA - 21.9
(19.8-24.0)
n = 1436
25.9
(22.6-29.2)
n = 697
- -
Non-specific - 40.4
(37.9-42.9)
n = 1433
53.5
(49.9-57.1)
n = 758
65.5
(61.2-69.8)
n = 460
-
  Definitions based on clinical judgement
Knee OA - 50.8
(48.4-53.2)
n = 1672
- - -
Hip OA - 36.1
(33.8-38.4)
n = 1672
- - -
Hand OA - 44.1
(41.7-46.5)
n = 1674
- - -
Non-specific 47.9
(44.1-51.7)
n = 670
69.6
(67.4-71.8)
n = 1672
40.5
(36.4-44.6)
n = 549
56.6
(52.1-61.1)
n = 468
-
  Definitions based on radiographic information
Knee OA - 17.7
(14.7-20.7)
n = 610
- - -
Hip OA - 7.4
(5.3-9.5)
n = 584
- - -
Hand OA - 55.0
(49.8-60.2)
n = 358
- - -
  1. Presented are the prevalence rates and 95% confidence intervals (95%CI) for site-specific and non-specific OA per country and per definition used. 95%CI was calculated as: p ± 1.96 * SE in which SE = √ (p (1 - p)/n) and p = proportion. Results were weighted for age and sex in the European Standard Population as of January 1, 2001, and stratified for age.