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Table 3 Content validity index of item relevancy and clarity and Modified Kappa agreement of Patient Rated Wrist/Hand Evaluation (PRWHE)

From: Evaluation of the content validity index of the Australian/Canadian osteoarthritis hand index, the patient-rated wrist/hand evaluation and the thumb disability exam in people with hand arthritis

Item

Relevance

Clarity

Interpretation

Agreement

I-CVI*

Pc**

K***

Agreement

I-CVI*

Pc**

K***

 

1. Pain subscale

 Rate your pain: At rest

51/64

0.80

<  10 − 5

0.80

50/53

0.94

<  10 − 5

0.94

Excellent

 Rate your pain: When doing a task with a repeated wrist movement

54/64

0.83

<  10 − 5

0.83

49/53

0.92

<  10 − 5

0.92

Excellent

 Rate your pain: When lifting a heavy object

54/64

0.83

<  10 −5

0.83

50/53

0.94

<  10 − 5

0.94

Excellent

 Rate your pain: When it is at its worst

57/64

0.89

<  10 −5

0.89

49/53

0.92

<  10 −5

0.92

Excellent

 How often do you have pain?

50/63

0.79

<  10 −5

0.79

47/54

0.87

<  10 −5

0.87

Excellent

2. Function

 A. Specific activities

  Turn a doorknob using my affected hand

53/63

0.84

<  10 −5

0.84

52/52

1.00

<  10 −5

1.00

Excellent

  Cut meat using a knife in my affected hand

54/63

0.86

<  10 −5

0.86

53/53

1.00

<  10 − 5

1.00

Excellent

  Fasten buttons on my shirt

51/63

0.81

<  10 −5

0.81

53/53

1.00

<  10 −5

1.00

Excellent

  Use my affected hand to push up from a chair

50/63

0.79

<  10 − 5

0.79

51/52

0.98

<  10 −5

0.98

Excellent

  Carry a 10 lb. object in my affected hand

58/63

0.92

<  10 −5

0.92

52/53

0.98

<  10 −5

0.98

Excellent

  Use bathroom tissue with my affected hand

50/63

0.79

<  10 −5

0.79

51/52

0.98

<  10 − 5

0.98

Excellent

 B. Usual activities

  Personal care activities (dressing, washing)

53/61

0.87

<  10 − 5

0.87

50/53

0.94

<  10 −5

0.94

Excellent

  Household work (cleaning, maintenance)

57/60

0.95

<  10 −5

0.95

49/53

0.92

<  10 −5

0.92

Excellent

  Work (your job or usual everyday work)

52/60

0.87

<  10 − 5

0.87

49/53

0.92

<  10 − 5

0.92

Excellent

  Recreational activities

54/60

0.90

<  10 − 5

0.90

51/53

0.96

<  10 − 5

0.96

Excellent

S – CVI/Ave

0.85 (95% CI: 0.82 to 0.88)

 

0.95 (95% CI: 0.93 to 0.97)

  
  1. NOTE: *I-CVI: item-level content validity index, **pc (probability of a chance occurrence) was computed using the formula: pc = [N! /A! (N -A)!] *.5N where N = number of raters and A = number of raters who agree that the item is relevant or clear, ***K (Modified Kappa) was computed using the formula: K = (I-CVI- PC)/(1- PC). Interpretation criteria for Kappa, using guidelines described in Cicchetti and Sparrow (1981): Fair = K of 0.40 to 0.59; Good = K of 0.60 to 0.74; and Excellent = K > 0.74. I-CVI, item-level content validity index; scale-level content validity index, average (S-CVI/Ave)