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Table 6 Logistic regression main effects and interactions of neighborhood poverty and primary payer on wait times from diagnosis to surgery and from surgery to radiation therapy among women with local-regional breast cancer

From: Mediation of the effects of living in extremely poor neighborhoods by health insurance: breast cancer care and survival in California, 1996 to 2011

    

[No chemotherapy]

[Had chemotherapy]

 

Waited > 60 days

Waited > 90 days

Waited > 210 days

 

diagnosis to surgery

surgery to radiation therapy

surgery to radiation therapy

Predictor variables

Sample

OR

(95% CI)

Sample

OR

(95% CI)

Sample

OR

(95% CI)

 

Single predictor models

Neighborhood poverty

  < 5% poor

1,975 

1.00

 

640

1.00

 

403

1.00

 

  5-29% poor

1,901 

1.21

(0.92, 1.59)

507

1.06

(0.71, 1.57)

382

0.84

(0.59, 1.18)

  ≥ 30% poor

1,841 

1.88

(1.46, 2.43)

382

1.50

(1.01, 2.25)

361

0.89

(0.63, 1.26)

Primary payer

  Uninsured or Medicaid

934 

1.00

 

224

1.00

 

252

1.00

 

  Medicare or private

4,783 

0.61

(0.48, 0.77)

1,305

0.52

(0.35, 0.77)

894

0.87

(0.62, 1.23)

 

Full models

Neighborhood poverty

  < 5% poor

1,975 

1.00

 

640 

1.00

 

403 

1.00

 

  5-29% poor

1,901 

1.95*

(0.94, 4.03)

507 

1.02

(0.69, 1.52)

382 

1.92

(1.02, 3.61)

  ≥ 30% poor

1,841 

2.86

(1.40, 5.82)

382 

1.37

(0.91, 2.06)

362 

1.54

(0.83, 2.84)

Primary payer

  Uninsured or Medicaid

934 

1.00

 

224 

1.00

 

252 

1.00

 

  Medicare or private

4,783 

1.13

(0.56, 2.29)

1,305 

0.55

(0.37, 0.82)

894 

0.65

(0.42, 1.00)

Poverty by payer

5,717 

0.52*

(0.25, 1.11)

1,529 

1.03a

(0.64, 1.67)

1,146 

1.96*

(0.97, 3.97)

 

Poverty by payer interaction on surgical wait times of more than 2 months

  

> 5% poor

 

< 5% poor

 
  

Sample

OR

(95% CI)

 

Sample

OR

(95% CI)

 

Primary payer

  Uninsured or Medicaid

 

765 

1.00

  

169 

1.00

  

  Medicare or private

 

2,977 

0.58

(0.44, 0.75)

 

1,806 

1.18

(0.58, 2.39)

 
 

Poverty by payer interaction among women who received chemotherapy on post-surgical wait times of more than 7 months for RT

  

> 30% poor

 

< 30% poor

 
  

Sample

OR

(95% CI)

 

Sample

OR

(95% CI)

 

Primary payer

  Uninsured or Medicaid

 

121

1.00

  

131

1.00

  

  Medicare or private

 

240

0.96

(0.59, 1.57)

 

654

0.70*

(0.47, 1.03)

 
  1. Notes. OR = odds ratio, CI = confidence interval. All effects were age and stage-adjusted across these categories: 25–44, 45–54, 55–64, 65–74 and 75 or older; and node positive or node negative breast cancer. Bolded ORs were statistically significant at p < .05.
  2. a Null interaction was removed from the full model. *p < 10.