Table 2

RRs and HRs of receiving breast cancer treatments between women with and without diabetes

n*Chemotherapy
Radiotherapy
RR (95% CI)HR unadjusted (95% CI)P valueaHR (95% CI)P valueRR (95% CI)HR unadjusted (95% CI)P valueaHR (95% CI)P value
Overall 4,955 0.93 (0.89–0.96) 0.89 (0.85–0.93) <0.001 1.01 (0.97–1.06) 0.56 0.93 (0.90–0.95) 0.91 (0.87–0.94) <0.001 0.94 (0.91–0.98) 0.003 
Stage III 697 0.93 (0.89–0.97) 0.85 (0.77–0.93) 0.006 1.03 (0.93–1.13) 0.59 — — — — — 
Lumpectomy only 2,708 — — — — — 0.97 (0.95–0.99) 0.96 (0.92–1.00) 0.03 0.98 (0.94–1.02) 0.32 
CVD            
 Yes 167 0.69 (0.43–1.09) 0.69 (0.43–1.09) 0.11 0.95 (0.79–1.15) 0.26 0.95 (0.79–1.15) 0.95 (0.73–1.23) 0.70 1.04 (0.80–1.35) 0.78 
 No 4,102 0.92 (0.88–0.97) 0.92 (0.88–0.97) 0.001 0.94 (0.91–0.97) 0.81 0.94 (0.91–0.97) 0.93 (0.89–0.97) 0.001 0.95 (0.91–0.99) 0.01 
Age (years)            
 <70 3,016 0.89 (0.85–0.94) 0.89 (0.85–0.94) <0.001 0.95 (0.90–1.00) 0.06 0.92 (0.89–0.95) 0.91 (0.87–0.96) <0.001 0.93 (0.89–0.97) 0.002 
 >70 1,896 0.82 (0.71–0.94) 0.82 (0.71–0.94) 0.04 0.91 (0.79–1.05) 0.19 0.93 (0.88–0.98) 0.90 (0.84–0.97) 0.005 0.95 (0.89–1.03) 0.21 
Diabetes duration (years)            
 <5 1,838 0.92 (0.86–0.99) 0.92 (0.86–0.99) 0.02 1.00 (0.93–1.07) 0.99 0.95 (0.91–0.99) 0.94 (0.89–1.00) 0.05 0.96 (0.90–1.02) 0.18 
 >5 3,117 0.89 (0.84–0.94) 0.82 (0.71–0.94) <0.001 1.04 (0.97–1.10) 0.27 0.91 (0.88–0.94) 0.88 (0.84–0.93) <0.001 0.92 (0.88–0.97) 0.002 
n*Chemotherapy
Radiotherapy
RR (95% CI)HR unadjusted (95% CI)P valueaHR (95% CI)P valueRR (95% CI)HR unadjusted (95% CI)P valueaHR (95% CI)P value
Overall 4,955 0.93 (0.89–0.96) 0.89 (0.85–0.93) <0.001 1.01 (0.97–1.06) 0.56 0.93 (0.90–0.95) 0.91 (0.87–0.94) <0.001 0.94 (0.91–0.98) 0.003 
Stage III 697 0.93 (0.89–0.97) 0.85 (0.77–0.93) 0.006 1.03 (0.93–1.13) 0.59 — — — — — 
Lumpectomy only 2,708 — — — — — 0.97 (0.95–0.99) 0.96 (0.92–1.00) 0.03 0.98 (0.94–1.02) 0.32 
CVD            
 Yes 167 0.69 (0.43–1.09) 0.69 (0.43–1.09) 0.11 0.95 (0.79–1.15) 0.26 0.95 (0.79–1.15) 0.95 (0.73–1.23) 0.70 1.04 (0.80–1.35) 0.78 
 No 4,102 0.92 (0.88–0.97) 0.92 (0.88–0.97) 0.001 0.94 (0.91–0.97) 0.81 0.94 (0.91–0.97) 0.93 (0.89–0.97) 0.001 0.95 (0.91–0.99) 0.01 
Age (years)            
 <70 3,016 0.89 (0.85–0.94) 0.89 (0.85–0.94) <0.001 0.95 (0.90–1.00) 0.06 0.92 (0.89–0.95) 0.91 (0.87–0.96) <0.001 0.93 (0.89–0.97) 0.002 
 >70 1,896 0.82 (0.71–0.94) 0.82 (0.71–0.94) 0.04 0.91 (0.79–1.05) 0.19 0.93 (0.88–0.98) 0.90 (0.84–0.97) 0.005 0.95 (0.89–1.03) 0.21 
Diabetes duration (years)            
 <5 1,838 0.92 (0.86–0.99) 0.92 (0.86–0.99) 0.02 1.00 (0.93–1.07) 0.99 0.95 (0.91–0.99) 0.94 (0.89–1.00) 0.05 0.96 (0.90–1.02) 0.18 
 >5 3,117 0.89 (0.84–0.94) 0.82 (0.71–0.94) <0.001 1.04 (0.97–1.10) 0.27 0.91 (0.88–0.94) 0.88 (0.84–0.93) <0.001 0.92 (0.88–0.97) 0.002 

CVD, cardiovascular disease (defined as cerebrovascular disease, acute myocardial infarction, and congestive heart failure).

*2:1 matches.

†Adjusted for CVD, chronic renal disease, dementia, and weighted ADG score.

‡Models in CVD (yes or no) subgroups adjusted for chronic renal disease, dementia, and weighted ADG score.

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