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Table 3 Determinants of Chemotherapy Use among Female Patients with Stage II Colon Cancer, SEER-Medicare 1996-2002

From: Screening mammography use and chemotherapy among female stage II colon cancer patients: a retrospective cohort study

  

Odds ratio

95% CI

Prior mammography use

No

Reference

 
 

Yes

1.28

(1.07-1.54)

Age-group

67-69

Reference

 
 

70-74

1.00

(0.77-1.30)

 

75-79

0.49

(0.39-0.63)

Race/ethnicity

White

Reference

 
 

Black

0.99

(0.67-1.45)

 

Other

1.31

(0.84-2.05)

State buy-in status

No

Reference

 
 

Yes

0.56

(0.43-0.73)

Marriage status

Single

Reference

 
 

Married

1.47

(1.20-1.80)

Metropolitan residence

No

Reference

 
 

Yes

1.38

(1.00-1.90)

Census tract median household income

<35,000

Reference

 
 

35,000-60,000

1.14

(0.92-1.42)

 

>60,000

0.98

(0.75-1.29)

Charlson score

0

Reference

 
 

1

1.11

(0.87-1.42)

 

2

0.86

(0.65-1.14)

 

3+

0.77

(0.56-1.04)

Hospital type

Non-teaching

Reference

 
 

Teaching

1.10

(0.89-1.37)

Tumor grade

Well/moderately differentiated

reference

 
 

Poorly differentiated/other

1.14

(0.93-1.39)

Extent of diseases

invasion through muscularis

Reference

 
 

extension to adjacent tissue

1.48

(1.20-1.83)

 

invasion of/through serosa

1.27

(0.86-1.89)

 

Other

2.91

(2.18-3.90)

Bowel obstruction or perforation

No

Reference

 
 

Yes

2.22

(1.55-3.16)

More than 12 lymph nodes examined

No

Reference

 
 

Yes

1.09

(0.91-1.31)

Oncologist visit

No

Reference

 
 

Yes

8.37

(5.78-12.1)

Year

1996-1998

Reference

 
 

1999-2000

1.28

(0.98-1.66)

 

2001-2002

1.36

(1.06-1.73)

  1. Note: The logistic model was mutually adjusted for all these determinants.