Dose-dense sequential chemotherapy with epirubicin and paclitaxel versus the combination, as first-line chemotherapy, in advanced breast cancer: a randomized study conducted by the Hellenic Cooperative Oncology Group.
OBJECTIVE
To compare the efficacy of two different schedules of epirubicin and paclitaxel, as first-line chemotherapy, in patients with advanced breast cancer (ABC).


METHODS
From October 1997 until May 1999, 183 eligible patients with ABC entered the study. Chemotherapy in group A (93 patients) consisted of four cycles of epirubicin at a dose of 110 mg/m(2) followed by four cycles of paclitaxel at a dose of 225 mg/m(2) in a 3-hour infusion. All cycles were repeated every 2 weeks with granulocyte colony-stimulating factor support. The therapeutic regimen in group B (90 patients) consisted of epirubicin (80 mg/m(2)) immediately followed by paclitaxel (175 mg/m(2) in a 3-hour infusion) every 3 weeks for six cycles.


RESULTS
In total, 79 patients (85%) in group A and 72 patients (80%) in group B completed treatment. The median relative dose-intensity of epirubicin was 0.96 in both groups, and that of paclitaxel was 0.96 and 0.97 in groups A and B, respectively. The complete response rate was higher in group A (21.5% v 9% P =.02). Nevertheless, there was no significant difference in the overall response rate between the two groups (55% v 42%, P =.10). Severe neutropenia was more frequently observed with concurrent treatment. After a median follow-up of 16.5 months, median time to progression was 10 months in group A and 8.5 months in group B (P =.27), and median survival was 21.5 and 20 months, respectively (P =.17).


CONCLUSIONS
The present study failed to demonstrate a significant difference in overall response rate between dose-dense sequential administration of epirubicin and paclitaxel compared with the combination of the two drugs given on the same day, even though the sequential treatment resulted in a significantly higher complete response rate.
Fountzilas
G
G
Aristotle University of Thessaloniki Medical School, Thessaloniki, Macedonia, Greece. fountzil@med.auth.gr
Papadimitriou
C
C
Dafni
U
U
Bafaloukos
D
D
Skarlos
D
D
Moulopoulos
L A
LA
Razis
E
E
Kalofonos
H P
HP
Aravantinos
G
G
Briassoulis
E
E
Papakostas
P
P
Abela
K
K
Gogas
E
E
Kosmidis
P
P
Pavlidis
N
N
Dimopoulos
M A
MA
D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000473:pathology; D018450:Disease Progression; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D015251:Epirubicin / Q000008:administration & dosage; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000008:administration & dosage; D006801:Humans; D008297:Male; D008875:Middle Aged; D009503:Neutropenia / Q000139:chemically induced; D017239:Paclitaxel / Q000008:administration & dosage; D016019:Survival Analysis; D016896:Treatment Outcome
D016179:Granulocyte Colony-Stimulating Factor; D015251:Epirubicin; D017239:Paclitaxel