Table 5.

Results From Regression Analyses of Cost of Care, With or Without Receiving at Least One Tumor Marker Test During the 2 Years (3 to 12 months and 13 to 24 months) After Diagnosis

Cost Time Period	% Increase (+) in Total Cost of Care*	95% CI
Months 3 to 12 after diagnosis
Receipt of tumor marker test†
No (reference)
Yes	+34.7‡	+31.4 to +38.0
Months 13 to 24 after diagnosis
Receipt of tumor marker test†
No (reference)
Yes	+28.4‡	+24.9 to +31.9

^*Analyzed by using the natural log transformation.

^†At any time during the 2 years after diagnosis.

^‡P < .001, two-sided t test.