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Table 4 Incidence rates (IRs, per 1000 person-months) and incidence rate ratios (IRRs) of psychiatric disorders and cardiovascular diseases during 6 weeks before diagnosis among women that had a breast diagnostic workup during 2005–2014 in Skåne, Sweden, a within-individual comparison

From: Psychiatric disorders and cardiovascular diseases during the diagnostic workup of potential breast cancer: a population-based cohort study in Skåne, Sweden

 

No. of events

Crude IR

IRR (95% CI)†

Psychiatric disorder

 Reference period*

29,010

17.5

1.0

 Unspecified lump in breast

578

26.4

1.0 (0.9–1.1)

 Benign tumor

155

25.2

1.3 (1.1–1.5)

 Breast cancer

278

24.0

1.4 (1.2–1.6)

Cardiovascular disease

 Reference period*

25,675

15.5

1.0

 Unspecified lump in breast

297

13.6

0.9 (0.8–1.1)

 Benign tumor

116

18.9

1.3 (1.1–1.5)

 Breast cancer

777

67.2

1.8 (1.7–2.0)

  1. IR incidence rate, IRR incidence rate ratio
  2. *Reference period included person-time accumulated before the start of workup from women with a breast diagnostic workup during the follow-up
  3. †CI confidence interval. IRRs were estimated using conditional Poisson regression, by using attained age as the underlying timescale
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Breast Cancer Research

ISSN: 1465-542X

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