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Table 2 Breast cancer specific hazard ratios comparing older to younger age at diagnosis, stratified by race/ethnicity, insurance status, and neighborhood (block group) statewide SES quintile, California, 2005–2015

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

 

Younger (18–59)

No. deaths due to breast cancer

Older (60+)

No. deaths due to breast cancer

HR (95% CI)a

Older vs. Younger (referent)

HR (95% CI)b

Older vs. Younger (referent)

Overall

7058

7706

1.14 (1.10–1.18)

1.35 (1.29–1.40)

Race/ethnicity

 Non-Hispanic White

3309

5199

1.29 (1.24–1.35)

1.43 (1.36–1.51)

 Non-Hispanic Black

926

682

0.91 (0.83–1.01)

1.17 (1.04–1.31)

 Hispanic

1892

1158

1.03 (0.96–1.11)

1.37 (1.26–1.50)

 Asian/Pacific Islander

873

628

1.15 (1.04–1.27)

1.15 (1.02–1.31)

 Other/unknown

58

39

0.75 (0.50–1.13)

0.56 (0.32–0.97)

Insurance statusc

 Private only

4258

2606

1.18 (1.12–1.24)

1.51 (1.43–1.59)

 Any Medicaid/Military/Other public

2360

1585

0.87 (0.82–0.93)

1.18 (1.10–1.26)

 No insurance

169

76

0.96 (0.74–1.26)

1.05 (0.78–1.43)

 Unknown

271

174

0.79 (0.65–0.95)

1.18 (0.96–1.45)

Neighborhood (block group) statewide SES quintile

 1st (lowest)

1375

1228

1.01 (0.93–1.09)

1.35 (1.23–1.48)

 2nd

1482

1595

1.07 (0.99–1.15)

1.24 (1.14–1.36)

 3rd

1509

1649

1.09 (1.02–1.17)

1.30 (1.19–1.41)

 4th

1451

1670

1.19 (1.11–1.28)

1.43 (1.31–1.56)

 5th (highest)

1241

1564

1.37 (1.27–1.48)

1.42 (1.29–1.56)

  1. HR Hazard ratio, CI Confidence interval, No. Number
  2. a Adjusted for year at diagnosis
  3. b Stratified by AJCC stage and adjusted for year of diagnosis, marital status, race/ethnicity (in models not stratified by this), insurance status (in models not stratified by this), nSES (in models not stratified by this), lymph node involvement, tumor subtype, tumor size, tumor grade, tumor histology, NCI-designated cancer center and clustering by block group
  4. c Medicare-insured patients < 60 years of age were excluded