Table 4.
Factor loadings of Brief Illness Perception Questionnaire (B-IPQ) at T1 (baseline) and T2 (1-year follow-up).
| Factor loadings | B | β | Composite reliability | P value |
| Consequence-T1 <--- B-IPQ T1 | 1.00 | .38 | -a | -a |
| Timeline-T1 <--- B-IPQ T1 | 1.22 | .34 | 2.42 | .01 |
| Personal control-T1 <--- B-IPQ T1 | 1.21 | .47 | 7.09 | <.001 |
| Treatment control-T1 <--- B-IPQ T1 | 1.71 | .65 | 8.11 | <.001 |
| Identity-T1 <--- B-IPQ T1 | 1.83 | .73 | 9.13 | <.001 |
| Concern-T1 <--- B-IPQ T1 | 2.17 | .81 | 8.52 | <.001 |
| Comprehension-T1 <--- B-IPQ T1 | 1.45 | .58 | 7.79 | <.001 |
| Emotional tesponse-T1 <--- B-IPQ T1 | 1.68 | .68 | 8.19 | <.001 |
| Consequence-T2 <--- B-IPQ T2 | 1.00 | .68 | -a | -a |
| Timeline-T2 <--- B-IPQ T2 | .61 | .45 | 12.41 | <.001 |
| Personal control-T2 <--- B-IPQ T2 | .43 | .33 | 7.25 | <.001 |
| Treatment control -T2 <--- B-IPQ T2 | .71 | .48 | 10.19 | <.001 |
| Identity-T2 <--- B-IPQ T2 | 1.07 | .74 | 14.13 | <.001 |
| Concern-T2 <--- B-IPQ T2 | 1.03 | .73 | 14.43 | <.001 |
| Comprehension-T2 <--- B-IPQ T2 | .65 | .48 | 10.27 | <.001 |
| Emotional response-T2 <--- B-IPQ T2 | .96 | .76 | 14.80 | <.001 |
aIn the confirmation factor analysis, the loading of this factor was fixed at 1.