Table 3 Median household income specific breast cancer and colorectal cancer incidence risk ratios^a, stratified by degree of urbanization, estimated by Poisson regression models in Texas, 1995–2011

Median household income quintiles

Breast cancer

Overall

Metro

Urban

Rural

1995–1999

 Income 2^nd

1.24 (1.13–1.36)

1.27 (1.13–1.43)

1.18 (1.01–1.39)

0.95 (0.61–1.50)

 Income 3^rd

1.45 (1.33–1.59)

1.58 (1.41–1.77)

1.35 (1.15–1.58)

0.88 (0.53–1.45)

 Income 4^th

1.35 (1.25–1.46)

1.39 (1.27–1.51)

1.39 (1.18–1.63)

0.92 (0.46–1.83)

 Income 5^th (High)

1.55 (1.45–1.67)

1.63 (1.50–1.77)

1.09 (0.84–1.43)

1.60 (0.97–2.67)

2000–2003

 Income 2^nd

1.41 (1.28–1.57)

1.55 (1.37–1.76)

1.21 (1.01–1.46)

0.80 (0.44–1.45)

 Income 3^rd

1.34 (1.21–1.49)

1.37 (1.18–1.58)

1.25 (1.05–1.48)

1.35 (0.78–2.34)

 Income 4^th

1.55 (1.41–1.71)

1.66 (1.48–1.86)

1.41 (1.17–1.71)

0.59 (0.27–1.29)

 Income 5^th (High)

1.74 (1.60–1.89)

1.86 (1.68–2.06)

1.47 (1.15–1.88)

1.15 (0.62–2.16)

2004–2007

 Income 2^nd

1.26 (1.14–1.40)

1.38 (1.22–1.56)

1.03 (0.86–1.24)

1.09 (0.57–2.12)

 Income 3^rd

1.42 (1.29–1.56)

1.61 (1.43–1.81)

1.11 (0.93–1.32)

0.93 (0.49–1.75)

 Income 4^th

1.38 (1.25–1.52)

1.46 (1.30–1.64)

1.24 (1.02–1.50)

0.57 (0.23–1.40)

 Income High

1.67 (1.54–1.81)

1.80 (1.63–1.98)

1.19 (0.92–1.55)

0.66 (0.30–1.48)

2008–2011

 Income 2^nd

1.22 (1.10–1.34)

1.19 (1.06–1.33)

1.35 (1.11–1.64)

0.94 (0.47–1.88)

 Income 3^rd

1.28 (1.16–1.41)

1.30 (1.16–1.46)

1.33 (1.10–1.61)

1.14 (0.61–2.16)

 Income 4^th

1.45 (1.34–1.58)

1.44 (1.31–1.58)

1.46 (1.18–1.82)

1.02 (0.45–2.33)

 Income 5^th (High)

1.69 (1.56–1.82)

1.66 (1.52–1.82)

1.91 (1.47–2.48)

1.31 (0.66–2.62)

Colorectal cancer

Overall

Metro

Urban

Rural

1995–1999

 Income 2^nd

1.40 (1.17–1.67)

1.27 (0.99–1.63)

1.29 (0.97–1.72)

0.54 (0.23–1.29)

 Income 3^rd

1.53 (1.28–1.82)

1.71 (1.35–2.16)

1.15 (0.85–1.54)

0.82 (0.31–2.17)

 Income 4^th

1.29 (1.10–1.50)

1.48 (1.23–1.78)

1.17 (0.87–1.58)

0.65 (0.17–2.55)

 Income 5^th (High)

1.27 (1.10–1.46)

1.52 (1.28–1.81)

1.08 (0.66–1.78)

1.42 (0.55–3.68)

2000–2003

 Income 2^nd

1.08 (0.90–1.30)

1.01 (0.79–1.29)

1.15 (0.84–1.58)

0.65 (0.24–1.74)

 Income 3^rd

1.33 (1.11–1.59)

1.37 (1.06–1.76)

1.14 (0.84–1.53)

0.71 (0.27–1.89)

 Income 4^th

1.36 (1.15–1.61)

1.54 (1.26–1.90)

1.14 (0.81–1.59)

0.64 (0.21–1.94)

 Income 5^th (High)

1.14 (0.99–1.32)

1.32 (1.10–1.59)

1.11 (0.71–1.75)

0.42 (0.05–3.50)

2004–2007

 Income 2^nd

1.21 (1.01–1.45)

1.08 (0.85–1.36)

1.16 (0.86–1.56)

1.25 (0.37–4.17)

 Income 3^rd

1.29 (1.09–1.53)

1.32 (1.06–1.63)

1.08 (0.80–1.45)

0.46 (0.12–1.73)

 Income 4^th

1.53 (1.30–1.81)

1.69 (1.38–2.06)

1.11 (0.81–1.54)

1.57 (0.39–6.36)

 Income 5^th (High)

1.16 (1.00–1.34)

1.29 (1.08–1.53)

1.38 (0.90–2.10)

0.56 (0.06–5.59)

2008–2011

 Income 2^nd

1.20 (1.01–1.43)

1.18 (0.94–1.48)

1.03 (0.76–1.39)

1.24 (0.43–3.56)

 Income 3^rd

1.51 (1.28–1.79)

1.70 (1.37–2.11)

1.02 (0.75–1.36)

0.93 (0.36–2.40)

 Income 4^th

1.30 (1.12–1.51)

1.53 (1.27–1.84)

1.05 (0.74–1.50)

3.13 (0.72–13.69)

 Income 5^th (High)

1.21 (1.05–1.40)

1.44 (1.20–1.71)

1.09 (0.69–1.73)

0.85 (0.30–2.42)