Table 2 Exploratory factor analysis for MUIS-P and MUIS-Cg

MUIS-P (n = 242)

Items

Factor 1 (Unpredictability)

Factor 2 (Ambiguity)

1. I have a lot of questions about my illness

0.43

0.13

2. I am unsure if the treatment I am getting for my cancer is helping

0.60

0.14

^#3. I know what side effects to expect from my treatment

−0.21

0.69

4. I feel uncertain about the future because of my illness

0.87

−0.13

5. Because of my illness, I am unsure what activities I will be able to do from day-to-day

0.79

0.02

6. I am bothered by the uncertainty caused by my illness

0.88

−0.09

^#7. The plan for treating my cancer is clear to me

−0.11

0.79

^#8. I can manage the uncertainty that my illness creates

0.22

0.65

^#9. I understand all of the information I have received about my illness

−0.05

0.78

MUIS-Cg (n = 242)

Factor 1 (Unpredictability)

Factor 2 (Ambiguity)

1. I have a lot of questions about his/her illness

0.39

0.23

2. I am unsure if the treatment he/she is getting for cancer is helping

0.45

0.21

^#3. I know what side effects to expect from his/her treatment

−0.20

0.76

4. I feel uncertain about the future because of his/her illness

0.85

−0.16

5. Because of his/her illness, I am unsure what activities I will be able to do from day-to-day

0.82

−0.08

6. I am bothered by the uncertainty caused by his/her illness

0.80

−0.01

^#7. The plan for treating his/her cancer is clear to me

−0.09

0.81

^#8. I can manage the uncertainty that his/her illness creates

0.14

0.60

^#9. I understand all of the information I have received about his/her illness

−0.02

0.84