Table 2.
nr | Item description | loading | α1 | α2 | ITC |
Factor 1: Communication with ophthalmologist | 0.89 | ||||
Q7 | Ophthalmologist treated me with respect | 0.88 | 0.88 | 0.66 | |
Q8 | Ophthalmologist listened carefully | 0.90 | 0.87 | 0.73 | |
Q9 | Ophthalmologist explained things clearly | 0.75 | 0.88 | 0.67 | |
Q10 | Ophthalmologist spent enough time | 0.85 | 0.87 | 0.74 | |
Q11 | Ophthalmologist went seriously into merits of my questions | 0.81 | 0.87 | 0.78 | |
Q12 | Ophthalmologist shared decision making | 0.68 | 0.87 | 0.74 | |
Q13 | Ophthalmologist took specific wishes into account | 0.68 | 0.87 | 0.74 | |
Q16 | Ophthalmologist talked about things that went wrong | 0.40 | 0.91 | 0.49 | |
Factor 2: Communication with nurses | 0.72 | ||||
Q30 | Nurses treat me with respect | 0.84 | 0.66 | 0.56 | |
Q31 | Nurses listened carefully | 0.84 | 0.59 | 0.63 | |
Q32 | Nurses explained things clearly | 0.80 | 0.62 | 0.56 | |
Q38 | Information was adequately coordinated* | 0.41 | 0.76 | 0.41 | |
Factor 3: Communication about medication | 0.79 | ||||
Q50 | Questions asked about allergic iodine | 0.91 | 0.69 | 0.65 | |
Q51 | Questions asked about allergic medication | 0.92 | 0.58 | 0.74 | |
Q52 | Clear information about side-effects medication | 0.61 | 0.83 | 0.51 | |
Factor 4: Rest items | 0.52 | ||||
Q16 | Ophthalmologist talked about things that went wrong | 0.41 | 0.43 | 0.33 | |
Q38 | Information was adequately coordinated | 0.53 | 0.36 | 0.44 | |
Q39 | Care was adequately coordinated | 0.57 | 0.36 | 0.40 | |
Q63 | How often did insurers compensate for costs medication | 0.46 | 0.61 | 0.12 |
Note: Cronbach's alpha of the whole scale (α1), Cronbach's alpha of the scale if item was deleted (α2), and corrected item total correlation (ITC) for the domains are shown. Factor loadings exceeding 0.40 are displayed. Q14, Q15, and Q49 were unrelated to any of the four factors and were not displayed.
* low corrected item total correlation (ITC) and an increase of the Cronbach's alpha of factor 2 if Q38 was deleted (α = 0.76) led to the exclusion of Q38 from factor 2.