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Table 3 Breast cancer specific hazard ratios stratified by age for race/ethnicity, health insurance, and neighborhood socioeconomic status, California, 2005–2015

From: Age-related differences in breast cancer mortality according to race/ethnicity, insurance, and socioeconomic status

 

Younger (18–59)

Older (60+)

No. deaths due to breast cancer

HR (95%CI)a

HR (95%CI)b

No. deaths due to breast cancer

HR (95%CI)a

HR (95%CI)b

All

7058

  

7706

  

Race/ethnicity

 Non-Hispanic White

3309

1.00

1.00

5199

1.00

1.00

 Non-Hispanic Black

926

2.36 (2.20–2.54)

1.36 (1.25–1.48)

682

1.79 (1.66–1.94)

1.11 (1.01–1.22)

 Hispanic

1892

1.42 (1.34–1.50)

0.95 (0.89–1.01)

1158

1.26 (1.18–1.34)

0.95 (0.88–1.02)

 Asian/Pacific Islander

873

0.90 (0.84–0.97)

0.88 (0.82–0.95)

628

0.89 (0.81–0.96)

0.77 (0.70–0.84)

 Other/unknown

58

0.91 (0.70–1.18)

0.83 (0.64–1.08)

39

0.58 (0.42–0.79)

0.50 (0.35–0.70)

 

P-interaction = < 0.0001c

Insurance status

 Private only

4258

1.00

1.00

2606

1.00

1.00

 Medicare only or Medicare+Private

-d

-d

-d

3265

1.04 (0.98–1.10)

1.00 (0.94–1.05)

 Any Medicaid/Military/Other public

2360

2.60 (2.47–2.74)

1.49 (1.41–1.58)

1585

1.73 (1.62–1.84)

1.13 (1.06–1.21)

 No insurance

169

3.04 (2.61–3.54)

1.96 (1.65–2.32)

76

2.74 (2.18–3.44)

1.57 (1.22–2.03)

 Unknown

271

1.47 (1.30–1.66)

1.11 (0.98–1.27)

174

0.92 (0.79–1.08)

0.86 (0.74–1.01)

 

P-interaction = < 0.0001c

Neighborhood (block group) statewide SES quintile

 1st (lowest)

1375

2.65 (2.45–2.86)

1.34 (1.22–1.46)

1228

1.93 (1.79–2.08)

1.38 (1.27–1.50)

 2nd

1482

2.09 (1.93–2.25)

1.34 (1.24–1.45)

1595

1.60 (1.49–1.71)

1.28 (1.18–1.38)

 3rd

1509

1.73 (1.61–1.87)

1.27 (1.17–1.37)

1649

1.36 (1.27–1.45)

1.19 (1.10–1.27)

 4th

1451

1.38 (1.28–1.49)

1.13 (1.05–1.22)

1670

1.18 (1.10–1.26)

1.12 (1.04–1.20)

 5th (highest)

1241

1.00

1.00

1564

1.00

1.00

 

P-interaction = 0.48c

  1. HR Hazard ratio, CI Confidence interval, No. Number
  2. a Adjusted for age at diagnosis and year at diagnosis
  3. b Stratified by AJCC stage and adjusted for age of diagnosis, year of diagnosis, marital status, race/ethnicity, insurance status, nSES, lymph node involvement, tumor subtype, tumor size, tumor grade, tumor histology, NCI-designated cancer center and clustering by block group
  4. cP for interaction between age group (younger and older) and race/ethnicity, insurance status, or nSES from a model that included all significant interactions with age group
  5. d Medicare-insured patients < 60 years of age were excluded