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Table 2 Individual item fit residual for final Rasch analysis of the Acceptance, Coping and Integration dimensions

From: Rasch analysis of the living with chronic illness scale in Parkinson’s disease

Item (response categories) Location Standard Error Fit Residual Chi-Square (df = 4) Probability
Acceptance
1. I get upset every time I think I have PD (0–3) − 0.459 0.104 0.972 6.775 0.148
3. I get angry when having PD symptoms (0–4) 0.238 0.081 −0.962 7.341 0.119
4. It bothers me to change the way I live and sacrifice important things in my life because of PD (0–4) 0.221 0.081 0.515 3.181 0.528
Coping
5. I try to cope and fight the diesase −0.220 0.081 0.289 3.274 0.35127
6. I am interested in looking for things that motivate me not to focus only in PD (0–3) 0.204 0.082 0.516 4.614 0.20237
7. I try to see the positive side of PD (0–3) 0.123 0.079 2.01 10.159 0.01726
9. (younger age). I hope the situation with PD improves (0–3) −0.329 0.098 −0.524 8.202 0.04202
9. (older age). I hope the situation with PD improves (0–3) 0.124 0.087 −1.448 5.796 0.12197
10. I have someone who listens to me and understands what I am living with PD (0–3) 0.099 0.080 1.352 1.427 0.69931
Integration
16. I have integrated PD in my daily living and all things related to it (0–3) −0.148 0.084 1.786 5.225 0.265
17. Despite PD, I lead a life as normal as possible (0–3) −0.240 0.085 −1.035 15.345 0.004
19. I am as interested and I have the same illusion in leisure activities as before having PD (0–3) 0.414 0.085 0.483 5.393 0.249
20. Although I have PD I feel satisfied with my life (0–4) −0.026 0.073 −0.281 2.269 0.686
  1. PD Parkinson’s disease, Df degrees of freedom