Table 3.
Final models of the variance in T2 anxiety, depression and trauma predicted by T1 illness perceptions after controlling for age and gender (Analysis 1) and age, gender and T1 levels of symptoms (Analysis 2)
| T2 anxiety | T2 depression | T2 trauma | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R2 change | Beta | T | p | R2 change | Beta | T | p | R2 change | Beta | T | p | |
| Analysis 1 | ||||||||||||
| Constant | 3.05 | .003 | 3.13 | .002 | 4.74 | .000 | ||||||
| Step 1–demographics | 13 %*** | 5 %** | 14 %*** | |||||||||
| Gender | −.19 | −3.04 | .003 | −.13 | −1.94 | .054 | −.14 | −2.28 | .023 | |||
| Age | −.21 | −3.28 | .001 | −.11 | −1.62 | .106 | −.27 | −4.19 | .000 | |||
| Step 2–IPQ-R | 12 %*** | 11 %** | 10 %*** | |||||||||
| Identity | ns | ns | ns | ns | ns | ns | ns | ns | ns | |||
| Cyclical timeline | ns | ns | ns | ns | ns | ns | ns | ns | ns | |||
| Chronic timeline | ns | ns | ns | ns | ns | ns | ns | ns | ns | |||
| Consequences | .22 | 3.41 | .001 | .19 | 2,75 | .006 | .19 | 2.92 | .004 | |||
| Illness coherence | ns | ns | ns | −.18 | −2.73 | .007 | −.24 | −3.76 | .000 | |||
| Psychological attributions | .19 | 2.97 | .003 | ns | ns | ns | ns | ns | ns | |||
| Personal control | −.14 | −2.18 | .030 | −.13 | −2.02 | .045 | ns | ns | ns | |||
| Treatment control | ns | ns | ns | ns | ns | ns | ns | ns | ns | |||
| R2 | 25 % | 16 % | 24 % | |||||||||
| Adj R2 | 23 % | 13 % | 23 % | |||||||||
| Analysis 2 | ||||||||||||
| Constant | 2.79 | .006 | 4.61 | .000 | 4.23 | .000 | ||||||
| STEP 1–demographics | 13 %*** | 5 %** | 14 %*** | |||||||||
| Gender | −.03 | −.42 | .675 | −.08 | −1.36 | .177 | −.04 | −.65 | .516 | |||
| Age | −.17 | −2.99 | .003 | −.15 | −2.41 | .017 | −.22 | −3.69 | .000 | |||
| Step 2—T1 symptoms | 25 %*** | 21 %*** | 23 %*** | |||||||||
| T1 Anxiety | .49 | 8.03 | .000 | – | – | – | – | – | – | |||
| T1 depression | – | – | – | .44 | 7.25 | .000 | – | – | – | |||
| T1 trauma | – | – | – | – | – | – | .46 | 7.40 | .000 | |||
| Step 2–IPQ-R ## | 3 %* | 3 %** | 2 %* | |||||||||
| Consequences | .13 | 2.17 | .032 | ns | ns | ns | ns | ns | ns | |||
| Illness coherence | – | – | – | −.16 | −2.65 | .009 | −.13 | −2.23 | .025 | |||
| Psychological attributions | ns | ns | ns | – | – | – | – | – | – | |||
| Personal control | −.11 | −2.08 | .039 | ns | ns | ns | – | – | – | |||
| R2 | 41 % | 29 % | 39 % | |||||||||
| Adj R2 | 39 % | 27 % | 37 % | |||||||||
R2 change shows increment in variance explained when each set of variables was entered sequentially; beta, T and p are from the final model containing variables from all steps
N.B. IPQ-R subscales entered using stepwise method
ns non significant, data not available using stepwise methods
* p < .05 , ** p < .01, *** p < .001
##Only subscales found to be significant predictors in Analysis 1 were entered. – indicates variable not included