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Table 3 Hazard ratios for psoriasis in the regional breast cancer cohort according to treatment characteristics

From: Risk and predictors of psoriasis in patients with breast cancer: a Swedish population-based cohort study

  Total no. No. of cases HR (95% CI)
  Model 1 Model 2
Endocrine therapy
 No 1533 27 1.00 (Ref.) 1.00 (Ref.)
 Yes 7100 121 0.90 (0.59–1.36) 0.80 (0.52–1.24)
Chemotherapy
 No 5544 102 1.00 (Ref.) 1.00 (Ref.)
 Yes 3070 46 0.82 (0.57–1.19) 0.70 (0.47–1.04)
Radiotherapy
 No 2061 23 1.00 (Ref.) 1.00 (Ref.)
 Yes 6574 125 1.78 (1.14–2.78) 2.44 (1.44–4.12)
Surgery
 Lumpectomy 5203 94 1.00 (Ref.) 1.00 (Ref.)
 Mastectomy 3459 55 0.96 (0.69–1.34) 1.54 (1.03–2.31)
  1. CI confidence interval, Total no. number of breast cancer patients, No. of cases number of psoriasis cases, HR hazard ratio
  2. Model 1: adjusted for age and calendar period of breast cancer diagnosis. Model 2: Model 1 plus all the treatment factors. Significant associations are denoted in boldface. Missingness on all variables is <5%. No evidence of non-proportional hazards was found