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Table 1 Sociodemographic and clinical characteristics of the psychometric sample (mean ± standard deviation)

From: Validation of the German version of the Neck Disability Index (NDI)

Variable

Total (n = 458)

Responsiveness subsample (n = 49)

Gender: N female (%)

424 (76%)

40 (81.6%)

Age (in years)

49.89 ± 11.40

47.92 ± 10.59

Pain intensity (in mm VAS)

45.69 ± 20.77

44.33 ± 19.02

Pain duration (in years)

7.54 ± 7.52

8.01 ± 6.38

Neck disability index

32.75 ± 13.09

27.36 ± 9.42

Pain on movement (in mm VAS)

42.85 ± 20.52

40.76 ± 20.07

Health-related quality of life (SF-36)

  

Physical functioning

75.32 ± 17.19

80.59 ± 14.48

Physical role functioning

44.14 ± 37.64

53.65 ± 34.97

Bodily pain

42.13 ± 13.87

46.82 ± 10.98

General health perceptions

60.05 ± 18.64

61.10 ± 19.04

Vitality

47.78 ± 18.58

47.55 ± 16.77

Social functioning

70.38 ± 23.58

72.96 ± 21.09

Emotional role functioning

64.61 ± 41.04

66.67 ± 39.51

Mental health

62.13 ± 17.62

64.41 ± 16.23

Physical component score

40.85 ± 7.93

43.21 ± 8.01

Mental component score

45.09 ± 11.63

45.28 ± 11.01

Range of motion

-

45.52 ± 9.04

  1. Abbreviations: SF-36 Short form 36 health survey, VAS visual analog scale.