Table 11.
Adjusted associations of patient and tumor characteristics with roles in decisions. (Standard errors in parentheses)
| Characteristic | Estimated difference in proportion reporting | p-value | ||||||
|---|---|---|---|---|---|---|---|---|
| Patient Control | Shared Control | Physician Control | ||||||
| Observed | Synthetic | Observed | Synthetic | Observed | Synthetic | Observed | Synthetic | |
| Level of evidence for treatment | < 0.001 | < 0.001 | ||||||
| Evidence for | * | * | * | * | * | * | ||
| Uncertain | 5.7 (1.4) | 5.7 (1.4) | −4.2 (1.4) | −4.0 (1.4) | −1.6 (1.0) | −1.6 (1.0) | ||
| No evidence for | −1.8 (1.8) | −1.7 (1.8) | −2.6 (1.7) | −2.6 (1.7) | 4.4 (1.2) | 4.3 (1.2) | ||
| Missing | 5.2 (2.7) | 5.0 (2.7) | −3.8 (2.6) | −3.6 (2.6) | −1.4 (1.8) | −1.5 (1.8) | ||
|
Preference sensitive |
< 0.001 | < 0.001 | ||||||
| No | * | * | * | * | * | * | ||
| Yes | −6.5 (1.5) | −6.2 (1.5) | 1.5 (1.6) | 1.4 (1.6) | 4.8 (1.2) | 4.8 (1.2) | ||
|
Treatment modal- ity |
< 0.001 | < 0.001 | ||||||
| Surgery | * | * | * | * | * | * | ||
| Radiation | −2.7 (1.2) | −2.6 (1.2) | 2.2 (1.2) | 2.2 (1.2) | 0.5 (0.9) | 0.4 (0.9) | ||
| Chemotherapy | 4.3 (0.9) | 4.3 (0.9) | −1.4 (0.9) | −1.3 (0.9) | −2.9 (0.7) | −3.0 (0.7) | ||
| Received treatment | < 0.001 | < 0.001 | ||||||
| No | * | * | * | * | * | * | ||
| Yes | 3.9 (1.4) | 3.9 (1.4) | 12.3 (1.3) | 12.4 (1.4) | −16.2 (1.2) | −16.3 (1.3) | ||
| Cancer site | 0.54 | 0.59 | ||||||
| Lung | * | * | * | * | * | * | ||
| Colorectal | −0.7 (1.5) | −0.4 (1.6) | −0.5 (1.5) | −0.6 (1.5) | 1.2 (1.0) | 1.0 (1.1) | ||
| Age at diagnosis (yrs) | 0.19 | 0.92 | ||||||
| 21-55 | * | * | * | * | * | * | ||
| 56-70 | 1.6 (2.1) | 2.6 (3.5) | 1.2 (2.1) | −2.7 (2.4) | −2.8 (1.4) | 0.1 (2.0) | ||
| 71-80 | 1.4 (2.3) | 1.9 (2.0) | 0.9 (2.2) | −1.7 (2.4) | −2.2 (1.5) | −0.1 (1.6) | ||
| ≥ 81 | 1.4 (2.3) | 0.6 (4.1) | −1.4 (2.3) | −2.5 (2.5) | 0.1 (1.6) | 1.8 (2.8) | ||
| Sex | 0.28 | 0.85 | ||||||
| Male * | * | * | * | * | * | |||
| Female | −2.0 (1.3) | 0.3 (1.9) | 1.1 (1.3) | −0.8 (1.8) | 1.0 (1.0) | 0.5 (1.0) | ||
| Ethnicity | 0.05 | 0.64 | ||||||
| White | * | * | * | * | * | * | ||
| Black | 1.4 (1.9) | −1.4 (2.8) | 1.6 (1.9) | 0.7 (2.5) | −3.0 (1.3) | 0.7 (2.5) | ||
| Hispanic | −5.1 (2.5) | −4.4 (3.7) | 4.4 (2.6) | 0.8 (3.3) | 0.7 (1.9) | 3.7 (2.4) | ||
| Asian | −2.2 (3.0) | 0.6 (3.7) | −2.3 (3.0) | −2.8 (3.4) | 4.4 (2.5) | 2.1 (2.7) | ||
| Other | 0.7 (2.8) | 1.2 (3.3) | 1.7 (2.9) | −0.8 (3.1) | −2.4 (1.9) | −0.4 (2.8) | ||
| Marital status | 0.005 | 0.42 | ||||||
| Married | * | * | * | * | * | * | ||
| Not married | −0.2 (1.4) | 1.3 (1.4) | −3.0 (1.4) | −2.1 (1.6) | 3.2 (1.1) | 0.7 (1.1) | ||
| Education | 0.07 | 0.58 | ||||||
| < High school (HS) | −2.1 (1.8) | −0.5 (1.8) | 0.6 (1.8) | 0.1 (2.2) | 1.5 (1.3) | 0.6 (1.6) | ||
| HS graduate or some college |
* | * | * | * | * | * | ||
| College degree or higher |
3.3 (1.5) | 3.2 (2.0) | −1.8 (1.5) | −2.9 (1.8) | −1.5 (1.0) | −0.3 (1.6) | ||
| Income $ | 0.08 | 0.08 | ||||||
| < 20,000 | 2.3 (2.1) | 1.2 (2.1) | −1.3 (2.1) | −2.3 (2.1) | 1.0 (1.5) | 1.0 (1.5) | ||
| 20,000 to < 40,000 | −2.5 (1.8) | −3.1 (1.8) | 2.4 (1.9) | 1.7 (1.9) | 0.1 (1.3) | 1.5 (1.4) | ||
| 40,000 to < 60,000 | −0.9 (1.9) | −1.2 (1.9) | −0.7 (1.9) | −1.2 (1.9) | 1.7 (1.5) | 2.4 (1.5) | ||
| ≥ 60,000 | * | * | * | * | * | * | ||
| No. self-reported comorbid conditions | 0.79 | 0.77 | ||||||
| 0 | * | * | * | * | * | * | ||
| 1 | 1.8 (1.4) | 1.8 (1.4) | −1.8 (1.4) | −1.9 (1.4) | −0.1 (1.0) | 0.0 (1.0) | ||
| 2 | 1.3 (1.9) | 1.2 (1.9) | −2.3 (1.9) | −2.4 (1.9) | 1.0 (1.4) | 1.1 (1.4) | ||
| ≥ 3 | 0.8 (2.6) | 0.9 (2.6) | −0.2 (2.7) | −0.3 (2.6) | −0.6 (1.9) | −0.6 (1.9) | ||
| Prediagnosis health status | 0.02 | 0.02 | ||||||
| Quartile 1 | * | * | * | * | * | * | ||
| Quartile 2 | 0.4 (1.7) | 0.4 (1.7) | 1.0 (1.7) | 0.8 (1.7) | −1.3 (1.2) | −1.1 (1.2) | ||
| Quartile 3 | 4.9 (1.8) | 4.9 (1.8) | −2.8 (1.8) | −3.0 (1.8) | −2.1 (1.3) | −1.9 (1.3) | ||
| Quartile 4 | 3.7 (1.8) | 3.8 (1.8) | −0.4 (1.8) | −0.5 (1.8) | −3.3 (1.2) | −3.3 (1.2) | ||
| CES-D short form | 0.26 | 0.28 | ||||||
| ≤ 5 | * | * | * | * | * | * | ||
| ≥ 6 | 2.6 (1.7) | 2.2 (1.7) | −2.7 (1.7) | −2.4 (1.7) | 0.1 (1.3) | 0.2 (1.3) | ||
| Study site | < 0.001 | < 0.001 | ||||||
| Los Angeles county | * | * | * | * | * | * | ||
| Alabama | −1.7 (2.3) | −0.9 (2.3) | 5.7 (2.3) | 5.6 (2.3) | −4.1 (1.5) | −4.7 (1.5) | ||
| 8 counties in North California |
2.5 (1.9) | 2.0 (1.9) | −2.2 (1.9) | −2.2 (1.9) | −0.3 (1.3) | 0.1 (1.3) | ||
| 22 counties in east- ern North Carolina |
−8.4 (2.1) | −7.9 (2.2) | 11.2 (2.4) | 10.9 (2.4) | −2.8 (1.5) | −3.0 (1.5) | ||
| Iowa | 1.1 (2.6) | 1.3 (2.6) | 4.0 (2.7) | 3.4 (2.7) | −5.1 (1.5) | −4.7 (1.5) | ||
| 5 HMOs | −1.1 (2.1) | −0.9 (2.1) | 2.1 (2.1) | 1.8 (2.1) | −1.1 (1.4) | −0.9 (1.4) | ||
| 15 Veterans Affairs hospitals |
0.2 (2.4) | 1.8 (2.5) | 1.9 (2.5) | 1.1 (2.5) | −2.1 (1.7) | −2.9 (1.7) | ||
*
reference group