Table 3 Principal Component Analysis
Component | Title | PDQ-39 Underlying Latent Variables |
|---|---|---|
1 | Independence/dependence This component incorporated all 13 questions from the first two dimensions of the PDQ-39 scale; Mobility and Activities Daily Living (ADL). The essence of this component reflects participants’ views around the HRQoL impact of Parkinson’s on perceived independence/dependence. | |
PDQ-39 Mobility dimension (Q1-Q10) PDQ-39 ADL dimension (Q11-Q13) | ||
2. | Experiencing stigma This component incorporated 2 questions from the PDQ-39 Communication dimension and 2 from the original Stigma dimension. This component elucidates the impact of perceived stigma, particularly when communicating and interacting with other people on participants’ HRQoL | |
PDQ-39 Communication dimension (Q34-Q35) PDQ-39 Stigma dimension (Q25, Q26) | ||
3 | Emotional well-being This component incorporated five questions from the PDQ-39 Emotional well-being dimension and explains patterns relating to the influence of emotional well-being on participants’ HRQoL. | |
PDQ-39 Emotional well-being dimension (Q17-Q20, Q22) | ||
4 | Experiencing pain This component included 2 questions from the Bodily discomfort dimension and reflects the impact of painful experiences such as cramps, spasms, aching/painful joints or body on participants’ HRQoL. | |
PDQ-39 Bodily discomfort dimension (Q37 and Q38) |