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Table 3 Pearson’s correlation matrix of the KOPEQ with the other variables

From: Validation of the 7-item knee replacement patient education questionnaire (KR-PEQ-7), based on the 16-item knee osteoarthritis patient education questionnaire (KOPEQ)

Measure 1 2 3 4 5 6
1. KOPEQ      
2. IP .77
(0.60 to 0.89)
    
3. S-TOFHLA 1 .15
(−0.18 to 0.44)
−.23
(−0.57 to 0.18)
   
4. S-TOFHLA 2 −.02
(−0.33 to 0.30)
.32
(0.07 to 0.55)
−.43 (−0.63 to −0.16)   
5. S-TOFHLA 3 .14
(− 0.24 to 0.46)
−.23
(− 0.57 to 0.11)
.59 (0.40 to 0.72) −.87
(− 0.94 to − 0.78)
 
6. MMSE .14
(−0.12 to 0.14)
.05
(− 0.28 to 0.34)
.13
(− 0.13 to 0.39)
−.11
(− 0.37 to 0.11)
.20
(− 0.07 to 0.49)
  1. Values are presented as Pearson’s correlation coefficient with 95% Confidence Interval
  2. KOPEQ (Knee Osteoarthritis Patient Education Questionnaire), IP (Interview Protocol), S-TOFHLA (Short Test of Functional Health Literacy; 1: reading comprehension; 2: total time needed; 3: number of points after 7 min), MMSE (Mini-Mental State Examination)