Table 2.
Bivariate results: IDM components and psychosocial correlates by decisional status, (n=812)
| Characteristic | Total Sample N=812 |
Decided N=285 (35%) |
Undecided N=511 (63%) |
P-value* | ||||
|---|---|---|---|---|---|---|---|---|
| IDM Components | ||||||||
| CaP Knowledge (N=785) | Mean | SD | Mean | SD | Mean | SD | ||
| 56% | 0.72 | 65 | 1.10 | 51 | 0.88 | < 0.01 | ||
| Decision Self-efficacy (N=791) | Mean | SD | Mean | SD | Mean | SD | ||
| 78% | 0.75 | 87 | 0.98 | 73 | 0.97 | <0.01 | ||
| Decisional Consistency** (N=786) | ||||||||
| N | (%) | N | (%) | N | (%) | |||
| Consistent | 656 | (81) | 267 | (94) | 378 | (74) | <0.01 | |
| Inconsistent | 130 | (16) | 13 | (5) | 115 | (23) | ||
| Psychosocial Correlates | N | (%) | N | (%) | N | (%) | ||
| Risk Perception (N=793) | ||||||||
| High/Medium | 401 | (49) | 143 | (50) | 254 | (50) | 0.97 | |
| Low | 392 | (48) | 138 | (48) | 244 | (48) | ||
| Control Preferences (N=802) | ||||||||
| Active | 523 | (65) | 182 | (64) | 333 | (65) | 0.42 | |
| Collaborative | 222 | (28) | 85 | (30) | 132 | (26) | ||
| Passive | 57 | (7) | 16 | (6) | 39 | (8) | ||
| Subjective Norms (N=796) | ||||||||
| Positive | 457 | (57) | 204 | (72) | 245 | (48) | <0.01 | |
| Negative | 339 | (43) | 77 | (27) | 255 | (50) | ||
| Social Norms (N=803) | ||||||||
| All/most | 137 | (17) | 60 | (21) | 75 | (15) | <0.01 | |
| more than half | 107 | (13) | 55 | (19) | 48 | (9) | ||
| less than half | 60 | (7) | 18 | (6) | 42 | (8) | ||
| Don't know | 499 | (62) | 148 | (52) | 342 | (67) | ||
*
P-values for knowledge and decision self-efficacy are from t-tests, all other p-values are from chi-square tests.
**
Items on values scale used for determining consistency. Each item was evaluated on a 4-point Likert scale (strongly agree (score=2), agree (score=1), disagree (score=−1), strongly disagree (score=−2)).
- It is important to me to have a PSA test, even if my doctors are not sure that screening can save lives.
- It is important to me to have a PSA test, even if there is a chance that the results could be wrong.
- Finding prostate cancer early and getting treatment is worth any possible side effect, including difficulty having sex or leaking urine.
- If I had prostate cancer, I would want to know- even if it wasn’t going to kill me.
- I do not want to have a PSA test, unless doctors are reasonably certain that it can save lives.
- I prefer not to be screened for prostate cancer if there is a chance that the results could be wrong.
- If getting treated for prostate cancer meant that I wouldn’t be able to have sex or that I might not be able to control my urine, I might choose not to get treated.
- If I had prostate cancer, I would rather not know- especially if it wasn’t going to kill me.