Skip to main content

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)