Quality-of-life-adjusted survival analysis of interferon alfa-2b treatment for advanced follicular lymphoma: an aid to clinical decision making.
OBJECTIVE
To evaluate the trade-off of toxicity versus improved clinical outcome with interferon alfa-2b (IFN) administered concomitantly with a doxorubicin-containing regimen for the treatment of advanced follicular lymphoma.


METHODS
A quality-of-life-adjusted survival analysis (Quality-Adjusted Time Without Symptoms or Toxicity [Q-TWiST]) was applied to the Groupe d'Etude des Lymphomes Folliculaires (GELF) trial 86, which compared a regimen of cyclophosphamide, doxorubicin, teniposide, and prednisone (CHVP) versus CHVP plus IFN in 242 patients with confirmed follicular lymphoma. CHVP was administered monthly for 6 months then every other month for 12 months. The IFN dosage was 5 x 10(6) U three times weekly for 18 months.


RESULTS
After a median follow-up duration of 72 months, the IFN group gained a mean of 12.3 months of progression-free survival (PFS) and 7.4 months of overall survival (OS), but also experienced additional time with grade 3 or worse toxicity compared with the CHVP group. Sensitivity analysis demonstrated that CHVP plus IFN provided a greater amount of quality-adjusted survival regardless of the relative quality-of-life valuations placed on time with toxicity due to CVHP alone, time with toxicity due to CHVP plus IFN, and time following disease progression. This gain was significant (P < .05) in all cases except for patients who consider time with toxicity to have a low relative value and time following disease progression to have a high relative value.


CONCLUSIONS
In patients with advanced follicular lymphoma, the clinical benefits of concomitant IFN can significantly offset the associated grade 3 or worse toxic effects. The magnitude of this clinical benefit depends on an individual patient's relative quality-of-life valuations for time with toxicity and time following disease progression.
Cole
B F
BF
Dartmouth Medical School, Lebanon, NH 03756, USA. bernard.f.cole@dartmouth.edu
Solal-Céligny
P
P
Gelber
R D
RD
Lepage
E
E
Gisselbrecht
C
C
Reyes
F
F
Sebban
C
C
Sugano
D
D
Tendler
C
C
Goldhirsch
A
A
D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D003520:Cyclophosphamide / Q000008:administration & dosage; D003657:Decision Making; D004317:Doxorubicin / Q000008:administration & dosage; D005260:Female; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000627:therapeutic use*; D008224:Lymphoma, Follicular / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D011241:Prednisone / Q000008:administration & dosage; D019057:Quality-Adjusted Life Years; D011994:Recombinant Proteins; D016019:Survival Analysis; D013713:Teniposide / Q000008:administration & dosage
D000970:Antineoplastic Agents; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D011994:Recombinant Proteins; D004317:Doxorubicin; D003520:Cyclophosphamide; D013713:Teniposide; D011241:Prednisone