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. Author manuscript; available in PMC: 2014 Feb 26.
Published in final edited form as: Ann Appl Stat. 2013 Dec 23;7(4):2062–2080. doi: 10.1214/13-AOAS665

Table 4.

Sensitivity of the estimated bladder cancer treatment cost ratio to an unmeasured Poisson confounder

λ0 λ1 Effect of confounder Cost ratio 95% CI
15 13 1.005 0.88 (0.80, 0.97)
15 11 1.005 0.89 (0.81, 0.98)
17 11 1.005 0.90 (0.82, 0.99)
19 11 1.005 0.91 (0.83, 1.00)
19 9 1.005 0.92 (0.83, 1.01)
15 13 1.01 0.89 (0.81, 0.98)
15 11 1.01 0.91 (0.83, 1.00)
17 11 1.01 0.93 (0.84, 1.02)
30 28 1.005 0.88 (0.80, 0.97)
30 26 1.005 0.89 (0.81, 0.98)
32 26 1.005 0.90 (0.82, 0.99)
34 26 1.005 0.91 (0.83, 1.00)
34 24 1.005 0.92 (0.83, 1.01)
30 28 1.01 0.89 (0.81, 0.98)
30 26 1.01 0.91 (0.83, 1.00)
32 26 1.01 0.93 (0.84, 1.02)

Unadjusted cost ratio = 0.87 (95% CI 0.79–0.96).

Boldface confidence intervals denote changes from the unadjusted inference.

λ0 = mean of unmeasured confounder in cystectomy group.

λ1 = mean of unmeasured confounder in rad/chemo group.