Table 3

Socio-demographic characteristics of the current study population and eight other Dutch shoulder research study populations

Current study

N = 72

Van der Windt 1996

N = 335

De Winter 1999

N = 201

Winters 1999

N = 101

Bot 2005

N = 281

Bergman 2005

N = 71

Kuijpers 2006

N = 492

Feleus 2008

N = 682

Reilingh 2008

N = 587


Age (years,± SD)

43 (12.3)

49.6 (14.4)

48 (12)

47.3 (15.4)

49.2 (13.8)

47.8 (11.8)

52 (14)

45*

49.5 (14.7)† 51.9 (13.9)‡ 52.9 (13.3)¶

Gender (%)

female

69

56

66

58

63

52

50

52

50

Education level

Low

6

NA

NA

NA

44

NA

NA

36

36

Medium

47

NA

NA

NA

42

NA

NA

36

41

High

47

NA

NA

NA

14

NA

NA

28

23

Duration of shoulder pain (month)

< 3 m

0

85

26

75

66

70

60

74

59

3-6 m

16

30

40

41

> 6 m

100

15

55

25

34

26


*Feleus reported the median instead of the mean age

†Mean age (±SD) of the acute pain group (< 6 weeks)

‡Mean age (±SD) of the subacute pain group (6-12 weeks)

¶Mean age (±SD) of the chronic pain group (> 3 months)

NA (not available). It was not possible to derive these data from the papers.

Bron et al. BMC Musculoskeletal Disorders 2011 12:139   doi:10.1186/1471-2474-12-139

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