Multivariate survival analysis: 2-year all-cause, cancer, and noncancer mortality
. | All-cause mortality . | Cancer mortality . | Noncancer mortality . | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
HR . | 95% CI . | P . | HR . | 95% CI . | P . | HR . | 95% CI . | P . | ||||
First-line treatment | ||||||||||||
Chemotherapy alone | Reference | Reference | Reference | |||||||||
Rituximab + chemotherapy | 0.58 | 0.41 | 0.82 | < .01 | 0.56 | 0.37 | 0.84 | < .01 | 0.83 | 0.25 | 2.80 | .77 |
Year of diagnosis* | ||||||||||||
1999-2002 | Reference | Reference | Reference | |||||||||
2003-2005 | 0.64 | 0.39 | 1.05 | .08 | 0.55 | 0.30 | 1.00 | .05 | 0.72 | 0.12 | 4.24 | .72 |
Age at diagnosis, y | ||||||||||||
66-70 | Reference | Reference | Reference | |||||||||
71-75 | 1.12 | 0.75 | 1.67 | .58 | 1.14 | 0.71 | 1.83 | .60 | 0.62 | 0.17 | 2.21 | .46 |
76-80 | 1.55 | 1.05 | 2.30 | .03 | 1.79 | 1.13 | 2.82 | .01 | 0.46 | 0.12 | 1.74 | .25 |
> 80 | 2.04 | 1.37 | 3.05 | < .001 | 2.36 | 1.47 | 3.77 | < .001 | 0.60 | 0.16 | 2.17 | .43 |
Sex | ||||||||||||
Male | Reference | Reference | Reference | |||||||||
Female | 0.64 | 0.48 | 0.85 | < .01 | 0.62 | 0.45 | 0.87 | < .01 | 1.07 | 0.41 | 2.78 | .89 |
Race/ethnicity | ||||||||||||
White | Reference | Reference | Reference | |||||||||
Black | 0.85 | 0.39 | 1.88 | .69 | 0.67 | 0.24 | 1.89 | .45 | 2.30 | 0.25 | 20.95 | .46 |
Hispanic | 0.64 | 0.30 | 1.39 | .26 | 0.73 | 0.32 | 1.69 | .46 | 2.53 | 0.24 | 26.88 | .44 |
Other | 0.82 | 0.39 | 1.69 | .58 | 0.64 | 0.26 | 1.61 | .35 | 4.59 | 0.84 | 25.10 | .08 |
Stage at diagnosis | ||||||||||||
I/II | Reference | Reference | Reference | |||||||||
III/IV | 1.44 | 0.98 | 2.12 | .06 | 1.61 | 1.00 | 2.58 | .05 | 1.07 | 0.37 | 3.10 | .91 |
Unknown/not stated | 0.95 | 0.47 | 1.94 | .89 | 1.40 | 0.64 | 3.08 | .40 | 0.18 | 0.02 | 1.80 | .15 |
Extranodal involvement | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.11 | 0.80 | 1.53 | .55 | 1.31 | 0.88 | 1.95 | .18 | 0.18 | 0.06 | 0.53 | < .01 |
Presence of “B” symptoms | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.58 | 1.12 | 2.25 | .01 | 1.47 | 0.97 | 2.23 | .07 | 1.55 | 0.41 | 5.81 | .52 |
Unknown | 1.01 | 0.74 | 1.37 | .96 | 1.07 | 0.76 | 1.52 | .69 | 1.75 | 0.60 | 5.11 | .31 |
Anemia | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.10 | 0.76 | 1.58 | .62 | 1.09 | 0.72 | 1.65 | .69 | 0.83 | 0.17 | 3.97 | .82 |
Leukocytosis | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.20 | 0.83 | 1.73 | .33 | 1.36 | 0.91 | 2.02 | .13 | 0.42 | 0.04 | 4.22 | .46 |
NCI Comorbidity Index | ||||||||||||
0 | Reference | Reference | Reference | |||||||||
1 | 1.05 | 0.77 | 1.43 | .76 | 1.05 | 0.74 | 1.50 | .78 | 0.17 | 0.02 | 1.44 | .10 |
2 | 0.84 | 0.45 | 1.54 | .57 | 0.60 | 0.27 | 1.32 | .20 | 1.96 | 0.49 | 7.90 | .34 |
≥ 3 | 1.37 | 0.82 | 2.28 | .23 | 1.42 | 0.79 | 2.56 | .24 | 0.84 | 0.13 | 5.51 | .86 |
Performance status indicators | ||||||||||||
None | Reference | Reference | Reference | |||||||||
≥ 1 | 1.52 | 1.09 | 2.12 | .01 | 1.51 | 1.03 | 2.20 | .04 | 2.92 | 0.83 | 10.26 | .09 |
Percent in census tract with some college | ||||||||||||
< 25% | Reference | Reference | Reference | |||||||||
> 25% | 0.95 | 0.72 | 1.25 | .71 | 0.87 | 0.63 | 1.19 | .38 | 1.78 | 0.59 | 5.36 | .30 |
Percent in census tract living in poverty | ||||||||||||
< 5% | Reference | Reference | Reference | |||||||||
5%-7% | 1.06 | 0.71 | 1.60 | .77 | 1.07 | 0.67 | 1.70 | .79 | 1.52 | 0.42 | 5.58 | .53 |
8%-12% | 1.20 | 0.83 | 1.72 | .33 | 1.31 | 0.87 | 1.97 | .20 | 1.01 | 0.27 | 3.83 | .99 |
> 12% | 1.48 | 1.05 | 2.11 | .03 | 1.35 | 0.89 | 2.03 | .15 | 1.64 | 0.46 | 5.79 | .44 |
Type of geographic area | ||||||||||||
Large metropolitan | Reference | Reference | Reference | |||||||||
Metropolitan | 0.82 | 0.60 | 1.11 | .19 | 0.79 | 0.56 | 1.13 | .20 | 0.25 | 0.07 | 0.90 | .03 |
Urban | 1.04 | 0.61 | 1.76 | .89 | 0.69 | 0.34 | 1.41 | .31 | 0.55 | 0.06 | 4.79 | .58 |
Less urban/rural | 0.69 | 0.43 | 1.10 | 0.12 | 0.78 | 0.46 | 1.30 | .34 | 0.27 | 0.03 | 2.37 | .23 |
. | All-cause mortality . | Cancer mortality . | Noncancer mortality . | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
HR . | 95% CI . | P . | HR . | 95% CI . | P . | HR . | 95% CI . | P . | ||||
First-line treatment | ||||||||||||
Chemotherapy alone | Reference | Reference | Reference | |||||||||
Rituximab + chemotherapy | 0.58 | 0.41 | 0.82 | < .01 | 0.56 | 0.37 | 0.84 | < .01 | 0.83 | 0.25 | 2.80 | .77 |
Year of diagnosis* | ||||||||||||
1999-2002 | Reference | Reference | Reference | |||||||||
2003-2005 | 0.64 | 0.39 | 1.05 | .08 | 0.55 | 0.30 | 1.00 | .05 | 0.72 | 0.12 | 4.24 | .72 |
Age at diagnosis, y | ||||||||||||
66-70 | Reference | Reference | Reference | |||||||||
71-75 | 1.12 | 0.75 | 1.67 | .58 | 1.14 | 0.71 | 1.83 | .60 | 0.62 | 0.17 | 2.21 | .46 |
76-80 | 1.55 | 1.05 | 2.30 | .03 | 1.79 | 1.13 | 2.82 | .01 | 0.46 | 0.12 | 1.74 | .25 |
> 80 | 2.04 | 1.37 | 3.05 | < .001 | 2.36 | 1.47 | 3.77 | < .001 | 0.60 | 0.16 | 2.17 | .43 |
Sex | ||||||||||||
Male | Reference | Reference | Reference | |||||||||
Female | 0.64 | 0.48 | 0.85 | < .01 | 0.62 | 0.45 | 0.87 | < .01 | 1.07 | 0.41 | 2.78 | .89 |
Race/ethnicity | ||||||||||||
White | Reference | Reference | Reference | |||||||||
Black | 0.85 | 0.39 | 1.88 | .69 | 0.67 | 0.24 | 1.89 | .45 | 2.30 | 0.25 | 20.95 | .46 |
Hispanic | 0.64 | 0.30 | 1.39 | .26 | 0.73 | 0.32 | 1.69 | .46 | 2.53 | 0.24 | 26.88 | .44 |
Other | 0.82 | 0.39 | 1.69 | .58 | 0.64 | 0.26 | 1.61 | .35 | 4.59 | 0.84 | 25.10 | .08 |
Stage at diagnosis | ||||||||||||
I/II | Reference | Reference | Reference | |||||||||
III/IV | 1.44 | 0.98 | 2.12 | .06 | 1.61 | 1.00 | 2.58 | .05 | 1.07 | 0.37 | 3.10 | .91 |
Unknown/not stated | 0.95 | 0.47 | 1.94 | .89 | 1.40 | 0.64 | 3.08 | .40 | 0.18 | 0.02 | 1.80 | .15 |
Extranodal involvement | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.11 | 0.80 | 1.53 | .55 | 1.31 | 0.88 | 1.95 | .18 | 0.18 | 0.06 | 0.53 | < .01 |
Presence of “B” symptoms | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.58 | 1.12 | 2.25 | .01 | 1.47 | 0.97 | 2.23 | .07 | 1.55 | 0.41 | 5.81 | .52 |
Unknown | 1.01 | 0.74 | 1.37 | .96 | 1.07 | 0.76 | 1.52 | .69 | 1.75 | 0.60 | 5.11 | .31 |
Anemia | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.10 | 0.76 | 1.58 | .62 | 1.09 | 0.72 | 1.65 | .69 | 0.83 | 0.17 | 3.97 | .82 |
Leukocytosis | ||||||||||||
No | Reference | Reference | Reference | |||||||||
Yes | 1.20 | 0.83 | 1.73 | .33 | 1.36 | 0.91 | 2.02 | .13 | 0.42 | 0.04 | 4.22 | .46 |
NCI Comorbidity Index | ||||||||||||
0 | Reference | Reference | Reference | |||||||||
1 | 1.05 | 0.77 | 1.43 | .76 | 1.05 | 0.74 | 1.50 | .78 | 0.17 | 0.02 | 1.44 | .10 |
2 | 0.84 | 0.45 | 1.54 | .57 | 0.60 | 0.27 | 1.32 | .20 | 1.96 | 0.49 | 7.90 | .34 |
≥ 3 | 1.37 | 0.82 | 2.28 | .23 | 1.42 | 0.79 | 2.56 | .24 | 0.84 | 0.13 | 5.51 | .86 |
Performance status indicators | ||||||||||||
None | Reference | Reference | Reference | |||||||||
≥ 1 | 1.52 | 1.09 | 2.12 | .01 | 1.51 | 1.03 | 2.20 | .04 | 2.92 | 0.83 | 10.26 | .09 |
Percent in census tract with some college | ||||||||||||
< 25% | Reference | Reference | Reference | |||||||||
> 25% | 0.95 | 0.72 | 1.25 | .71 | 0.87 | 0.63 | 1.19 | .38 | 1.78 | 0.59 | 5.36 | .30 |
Percent in census tract living in poverty | ||||||||||||
< 5% | Reference | Reference | Reference | |||||||||
5%-7% | 1.06 | 0.71 | 1.60 | .77 | 1.07 | 0.67 | 1.70 | .79 | 1.52 | 0.42 | 5.58 | .53 |
8%-12% | 1.20 | 0.83 | 1.72 | .33 | 1.31 | 0.87 | 1.97 | .20 | 1.01 | 0.27 | 3.83 | .99 |
> 12% | 1.48 | 1.05 | 2.11 | .03 | 1.35 | 0.89 | 2.03 | .15 | 1.64 | 0.46 | 5.79 | .44 |
Type of geographic area | ||||||||||||
Large metropolitan | Reference | Reference | Reference | |||||||||
Metropolitan | 0.82 | 0.60 | 1.11 | .19 | 0.79 | 0.56 | 1.13 | .20 | 0.25 | 0.07 | 0.90 | .03 |
Urban | 1.04 | 0.61 | 1.76 | .89 | 0.69 | 0.34 | 1.41 | .31 | 0.55 | 0.06 | 4.79 | .58 |
Less urban/rural | 0.69 | 0.43 | 1.10 | 0.12 | 0.78 | 0.46 | 1.30 | .34 | 0.27 | 0.03 | 2.37 | .23 |
All models also included an interaction term between type of first-line therapy and year of diagnosis. The interaction term did not meet the threshold for statistical significance (P ≤ .05) in any of the models.