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Table 2 Variability in the WOMAC questionnaire by intervention type

From: Variability of indication criteria in knee and hip replacement: an observational study

VARIABILITY INDICATORS

WOMAC QUESTIONNAIRE

 

Pain

Stiffness

Functional capacity

 

Hip

Knee

Hip

Knee

Hip

Knee

No. of cases

622

981

622

981

622

981

Range

47.5-68.3

51.7-65.5

45.1-67.2

45.7-67.3

61.1-82.5

53.3-72.5

Mean (SD)

57.1 (5.7)

57.2 (4.3)

59.4 (5.3)

59.5 (6.5)

67.4 (5.9)

63.8 (5.3)

Weighted mean (SD)

56.5 (4.9)

57.0 (4.0)

58.9 (6.2)

58.7 (6.7)

66.1 (4.2)

63.5 (4.6)

EQ5-95

1.4

1.24

1.5

1.47

1.3

1.32

CV5-95

0.08

0.06

0.08

0.11

0.06

0.06

WCV5-95

0.05

0.06

0.10

0.11

0.06

0.06

  1. SD - Standard deviation
  2. EQ5-95 - Extremal quotient for the 5-95 percentile range
  3. CV5-95 - Coefficient of variance for the 5-95 percentile range
  4. WCV5-95 - Weighted coefficient of variance for the 5-95 percentile range