Table 3.

Impact of Variables.

Variable	Effect Magnitude	p-Value	Confidence Interval
Sex *	0.111	0.270	−0.086 to 0.309
Smoking history	−0.191	0.089	−4.110 to 0.029
Ethnicity (Black vs. White)	0.090	0.308	−0.830 to 0.264
Ethnicity (All other vs. White)	0.117	0.233	0.075 to 0.309
Cancer stage (III/IV vs. I/II)	−0.154	0.090	−0.333 to 0.024
Histology (adeno vs. non)	−0.057	0.619	−0.280 to 0.166
Steroid use	−0.248	0.043	−0.488 to −0.008
Chemotherapy	−0.186	0.033	−0.358 to −0.015
Targeted Therapy	−0.113	0.347	−0.350 to 0.123
Immune therapy	−0.009	0.912	−0.165 to 0.148
Influenza vax	0.330	<0.001	0.150 to 0.509
SARS-CoV-2 booster	0.412	<0.001	0.291 to 0.534
SARS-CoV-2 infection	0.276	<0.001	0.128 to 0.425

Negative effects (those associated with decreased titers) are indicated in red. Significant findings are bolded. * Nonlinear effects of “Time after full vaccination” and “Age” on titers are shown in Supplemental Table S3.