Table 4 Association of incident NHL with incident breast cancer according to treatment status.

From: Risk of non-Hodgkin lymphoma in breast cancer survivors: a nationwide cohort study

Type of treatment after breast cancer

Non-Hodgkin lymphoma HR (95% CI) P-value

DLBCL HR (95% CI) P-value

Follicular lymphoma HR (95% CI) P-value

Mature T/NK-cell lymphomas HR (95% CI) P-value

ALCLHR (95% CI) P-value

Other NHL* HR (95% CI) P-value

Any treatment

 Incident breast cancer without adjuvant therapy

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 Incident breast cancer with adjuvant therapy

0.77 (0.41, 1.43) 0.40

0.50 (0.15, 1.74) 0.28

0.37 (0.08, 1.71) 0.20

0.83 (0.36, 1.92) 0.66

Chemotherapy

Incident breast cancer without chemotherapy

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Incident breast cancer with chemotherapy

0.76 (0.51, 1.12) 0.16

0.59 (0.23, 1.48) 0.26

0.40 (0.12, 1.30) 0.13

1.09 (0.34, 3.57) 0.88

0.68 (0.11, 4.13) 0.67

0.83 (0.50, 1.39) 0.49

Radiation therapy

Incident breast cancer without radiation therapy

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Incident breast cancer with radiation therapy

0.95 (0.61, 1.48) 0.81

1.17 (0.39, 3.56) 0.78

0.78 (0.21, 2.96) 0.72

0.98 (0.27, 3.58) 0.98

0.42 (0.07, 2.51) 0.34

0.90 (0.51, 1.59) 0.72

Hormone therapy

Incident breast cancer without hormone therapy

Reference

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Incident breast cancer with hormone therapy

2.68 (1.83, 3.94) < 0.01

2.15 (0.83, 5.55) 0.11

1.26 (0.33, 4.75) 0.73

3.91 (1.31, 11.64) 0.01

4.81 (0.80, 28.89) 0.09

2.98 (1.82, 4.89) < 0.01

  1. HR hazard ratio, CI confidence interval, ALCL anaplastic large cell lymphoma, DLBCL Diffuse large B-cell lymphoma, NHL non-Hodgkin lymphom.
  2. Age as the time scale. Adjusted for body mass index categories (underweight, normal, overweight, obese, and unknown), alcohol consumption (none, moderate, heavy, and unknown), moderate–vigorous physical activity (none, 1–2 times per week, >3 times per week, and unknown), smoking status (never, ever, or unknown), and income percentile (Medicaid, ≤30th, 31st–70th, >70th).