Table 4 Logistic regression results for main effects and interactions of neighborhood poverty and primary payer on high quality investigation and early stage at diagnosis
15 or more regional lymph nodes examined | Stage I or stage II at the time of diagnosis | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Predictor variables | No.a | OR | (95%CI) | No.a | OR | (95%CI) | |||
Single predictor models | |||||||||
Neighborhood poverty | |||||||||
< 5% poor | 1,727 | 1.00 | 1,959 | 1.00 | |||||
5-29% poor | 1,646 | 0.92 | (0.79, 1.07) | 1,923 | 0.81 | (0.72, 0.92) | |||
≥ 30% poor | 1,583 | 0.95 | (0.81, 1.11) | 1,894 | 0.89* | (0.79, 1.01) | |||
Primary payer | |||||||||
Uninsured | 241 | 1.00 | 310 | 1.00 | |||||
Medicaid | 229 | 2.01 | (0.74, 1.65) | 261 | 1.06 | (0.77, 1.48) | |||
Medicare | 2,221 | 1.11 | (0.81, 1.53) | 2,601 | 1.33 | (1.04, 1.71) | |||
Private | 2,265 | 0.97 | (0.72, 1.30) | 2,604 | 1.30 | (1.03, 1.65) | |||
Full models | |||||||||
Neighborhood poverty | |||||||||
< 5% poor | 1,727 | 1.00 | 1,959 | 1.00 | |||||
5-29% poor | 1,646 | 1.34* | (0.99, 1.80) | 1,923 | 0.82 | (0.72, 0.93) | |||
≥ 30% poor | 1,583 | 1.97 | (1.17, 3.32) | 1,894 | 0.91 | (0.80, 1.04) | |||
Primary payer | |||||||||
Uninsured | 241 | 1.00 | 310 | 1.00 | |||||
Medicaid | 229 | 1.30 | (0.86, 1.98) | 261 | 1.07 | (0.77, 1.49) | |||
Medicare | 2,221 | 2.03 | (1.22, 3.41) | 2,601 | 1.33 | (1.03, 1.70) | |||
Private | 2,265 | 1.49* | (0.97, 2.29) | 2,604 | 1.28 | (1.01, 1.63) | |||
Poverty by payer | 4,956 | 0.85 | (0.76, 0.94) | Null interaction removed | |||||
Poverty by payer interaction on high quality investigation | |||||||||
> 30% poor | 5-29% poor | < 5% poor | |||||||
No.a | OR | (95% CI) | No.a | OR | (95% CI) | No.a | OR | (95% CI) | |
Primary payer | |||||||||
Uninsured | 114 | 1.00 | 72 | 1.00 | 55 | 1.00 | |||
Medicaid | 144 | 1.11 | (0.65, 1.88) | 63 | 0.70 | (0.32, 1.53) | 22 | 1.91 | (0.63, 5.79) |
Medicare | 794 | 0.93 | (0.58, 1.48) | 753 | 0.92 | (0.52, 1.63) | 674 | 2.01 | (1.02, 3.99) |
Private | 531 | 1.00 | (0.64, 1.57) | 758 | 0.85 | (0.50, 1.45) | 976 | 1.32 | (0.68, 2.55) |