Table 3 Poisson regression model predicting number of lines of chemotherapy in patients with MBC.

From: Effects of socioeconomic status and race on survival and treatment in metastatic breast cancer

 

Incidence Rate Ratio (IRR)

P-value

Age at diagnosis

0.98

<0.001

Race = Black, Ref = white

0.81

0.002

SES = low SES, Ref = High SES

0.91

0.005

Diagnosis of MBC after 2010, Ref before 2010

0.99

0.79

Subtype = ER + /HER2-, Ref ER-/HER2+

0.84

0.002

Subtype = ER + /HER2 + , Ref ER-/HER2+

1.02

0.75

Subtype = Triple negative, Ref ER-/HER2+

0.99

0.9

  1. SES Socioeconomic Status, MBC Metastatic Breast Cancer, Ref Reference.