Table 2.
Time-to-Event Analysis for the Last Data Collection Time-Point Among RBCS Participants
| Covariate | Saturated Model | Reduced Model | ||
|---|---|---|---|---|
| Hazard Ratio (95% CL) | P | Hazard Ratio (95% CL) | P | |
| Group Assignment | ||||
| Experimental | 0.65 (0.42, 1.01) | 0.0646 | - | - |
| Wait Control | Ref | |||
|
| ||||
| Age* | 0.71 (0.5, 1.01) | 0.0641 | - | - |
|
| ||||
| Race | ||||
| Caucasian | 0.72 (0.29, 1.79) | 0.552 | - | - |
| Other | Ref | |||
|
| ||||
| Annual Income | ||||
| ≤$30,000 | 1.36 (0.62, 3.01) | 0.4468 | - | - |
| $30,001 – $50,000 | 1.61 (0.71, 3.63) | 0.256 | - | - |
| >$50,000 | 0.96 (0.42, 2.15) | 0.9549 | - | - |
| No response | Ref | |||
|
| ||||
| Marital Status | ||||
| Married/partnered | 0.64 (0.37, 1.13) | 0.1372 | - | - |
| Other | Ref | |||
|
| ||||
| Employment | ||||
| Full-time | 2.65 (1.23, 5.73) | 0.0174 | 1.71 (1.1, 2.65) | 0.0173 |
| Part-time | 2.2 (0.91, 5.35) | 0.1038 | - | - |
| Retired | 1.98 (0.83, 4.72) | 0.1479 | - | - |
| Other | Ref | |||
|
| ||||
| Education | ||||
| < High School | 0.54 (0.13, 2.21) | 0.4298 | - | - |
| High School grad | 1.3 (0.55, 3.05) | 0.5632 | - | - |
| Trade school/ Some college | 1.41 (0.64, 3.07) | 0.4228 | 1.58 (1.03, 2.41) | 0.0345 |
| College grad | 0.97 (0.42, 2.22) | 0.9459 | - | - |
| Postgraduate | Ref | |||
|
| ||||
| Health Insurance | ||||
| Yes | 0.37 (0.16, 0.85) | 0.0251 | 0.4 (0.2, 0.83) | 0.013 |
| No | Ref | |||
|
| ||||
| Mo's since Dx* | 1.42 (0.97, 2.08) | 0.0812 | - | - |
|
| ||||
| Mo's since end of Tx* | 0.7 (0.47, 1.03) | 0.0807 | - | - |
|
| ||||
| Surgery | ||||
| Lumpectomy | 1.18 (0.53, 2.6) | 0.7253 | - | - |
| Mastectomy | 0.74 (0.36, 1.52) | 0.3933 | - | - |
| Bilateral mastectomy | Ref | |||
|
| ||||
| Chemotherapy | ||||
| Yes | 0.74 (0.43, 1.27) | 0.3011 | - | - |
| No | Ref | |||
|
| ||||
| Radiation Therapy | ||||
| Yes | 0.53 (0.28, 0.99) | 0.0642 | - | - |
| No | Ref | |||
|
| ||||
| Hormonal Therapy | ||||
| Yes | 0.69 (0.45, 1.08) | 0.1253 | 0.65 (0.42, 0.99) | 0.0433 |
| No | Ref | |||
|
| ||||
| Depression CES-D* | 0.99 (0.7, 1.42) | 0.9618 | - | - |
|
| ||||
| MOS Overall Social Support* | 1.33 (1.02, 1.74) | 0.0468 | - | - |
|
| ||||
| SF-36 PCS * | 0.79 (0.62, 1) | 0.0669 | - | - |
|
| ||||
| SF-36 MCS * | 0.68 (0.49, 0.96) | 0.0387 | 0.73 (0.6, 0.89) | 0.0018 |
|
| ||||
| Fit statistics | ||||
| AIC | 683.924 | 673.059 | ||
| -2LogLikelihood (model parameters)† | 631.924 (26) | 663.059 (5) | ||
Notes: AIC, Akaike Information Criterion. Smaller values indicate a better trade-off between the accuracy of a model and the number of predictors included in the model
*
Hazard ratio for a standard deviation increase
†
Used to test the difference in fit between models: χ2(21)=31.135, P=0.0714
Copyright, The Authors, 2013