FEMARA® significantly improves disease-free survival (DFS) as initial adjuvant therapy for postmenopausal women with hormone receptor positive (HR+) in early breast cancer.1
At 26-month median follow-up, FEMARA® delivered a significant 19% reduction in overall risk of recurrence in BIG 1-981,2-a large multinational initial adjuvant trial comparing an aromatase inhibitor (AI) with tamoxifen3
Significant reduction in overall risk of recurrence
at 26-month median follow-up in BIG 1-98 study1,2
BIG 1-98: a phase 3, randomized, double-blind trial of FEMARA® versus tamoxifen as initial adjuvant therapy for early breast cancer1
BIG 1-98 study design1-3
- The primary core analysis at 26-month median follow-up includes data from 4922 patients randomized to monotherapy (arms A and B) and truncated data at 2 years from 3088 patients randomized to sequential adjuvant therapy (arms C and D)1-3
- In the 2 sequential arms, data were truncated 30 days after switch1,3
References: 1. The Breast International Group (BIG) 1-98 Collaborative Group. A comparison of letrozole and tamoxifen in postmenopausal women with early breast cancer. N Engl J Med. 2005;353(26):2747-2757. 2. Mouridsen H, for the BIG 1-98 Collaborative Group. Letrozole monotherapy vs. tamoxifen monotherapy or vs. letrozole in sequence with tamoxifen for postmenopausal women with endocrine-responsive early breast cancer. Presented at: 31st Annual San Antonio Breast Cancer Symposium (SABCS); December 10-14, 2008; San Antonio, Texas. 3. FEMARA® (letrozole) [summary of product characteristics]. Basel, Switzerland: Novartis Pharma AG; 2009.
But FEMARA® also helps protect your patients from the most serious threat1* …
Breast cancer recurrence initially peaks 2 years after surgery and is mainly due to distant metastases, which are associated with the lowest survival rates compared with other recurrences.4,5†
FEMARA® (letrozole) can help you protect significantly more patients from distant metastases early on1
FEMARA® is the only AI versus tamoxifen that significantly reduces the early risk of distant metastases1,2,6*
At 26-month follow-up in BIG 1-98, FEMARA® delivered:
- Significant 27% reduction in the risk of distant metastases versus tamoxifen1,2
Significant reduction in risk of distant metastases
at median 26-month follow-up in BIG 1-98 study1
- Nonsignificant 14% reduction in risk of mortality versus tamoxifen (P=0.15)1
Standard adjuvant treatment duration is 5 years or until relapse1 …
Over time, FEMARA® (letrozole) continues to provide protection against distant metastases7
At 73-month median follow-up in BIG 1-98, FEMARA® is the only AI treatment versus tamoxifen to both7,8:
- Significantly improve disease-free survival7 and
- Significantly improve time to distant recurrence7
At a median follow-up of 73 months and a median treatment duration of 60 months, the risk of a disease-free survival event was significantly reduced with FEMARA® compared with tamoxifen (intent-to-treat [ITT] analysis: HR 0.87; 95% CI: 0.76-0.99; P=0.03; censored analysis: HR 0.84; 95% CI: 0.73-0.95), confirming the 2005 PCA results.9
Similarly, the updated analysis confirmed the superiority of FEMARA® in reducing the risk of distant metastases (HR 0.85; 95% CI: 0.72-1.00). Additionally, while not statistically significant, overall survival trended toward significance in the ITT analysis.9
Explanation of ITT versus censored analyses
ITT analyses were conducted ignoring the selective crossover. Censored analyses were conducted censoring follow-up/event times at the date of selective crossover in 632 women (26%) who crossed to FEMARA® or another aromatase inhibitor after the tamoxifen arms were unblinded in 2005, based on superior efficacy of FEMARA® over tamoxifen and following the recommendations of the Data Monitoring Committee.9
Of these 632 women, 448 (70%) crossed to FEMARA® to complete initial adjuvant therapy. All of these women were in Option 1 and most crossed in Years 3 to 4, at a median 43 months from randomization. Median duration of FEMARA® after crossing was 17 months. The remaining 184 women crossed to FEMARA® (172 women) or another aromatase inhibitor (12 women) to start extended adjuvant treatment, having received tamoxifen for 4.5 to 5 years.9
BIG 1-98 monotherapy update at
median 73-month median follow-up7
‡FEMARA®:tamoxifen—breast cancer events, 321:363; second (nonbreast) malignancy, 101:115; deaths without prior cancer event, 87:87.
At 73-month median monotherapy follow-up,* FEMARA® was compared with tamoxifen in 2 analyses1:
- Intent-to-treat (ITT),† in which the tamoxifen arm included 26% of patients who crossed over to FEMARA® in years 3 to 51,2‡
- Censored,§ in which patients who crossed over to FEMARA® were excluded at the time of switch1,2
BIG 1-98 study—73-month median follow-up1
†Includes all patients and all events.2
‡Based on significant benefits seen with FEMARA® in the primary core analysis, the protocol was amended in
2005 to offer FEMARA® to those patients assigned to tamoxifen monotherapy. A total of 632 patients (26%)
from the tamoxifen monotherapy arm crossed over to receive FEMARA®.1
§Includes all patients, but excludes the follow-up events of tamoxifen patients who crossed over to FEMARA®
from the time they switched.2
References: 1. Mouridsen H, for the BIG 1-98 Collaborative Group. Letrozole monotherapy vs. tamoxifen monotherapy or vs. letrozole in sequence with tamoxifen for postmenopausal women with endocrine-responsive early breast cancer. Presented at: 31st Annual San Antonio Breast Cancer Symposium (SABCS); December 10-14, 2008; San Antonio, Texas. 2. Data on file. Novartis Oncology, East Hanover, NJ.
So, for your postmenopausal patients with HR+ early breast cancer, consider the threat …
- Distant metastases, which initially peak 2 years after surgery, are associated with the lowest survival rates compared with other recurrences4,5
...and start and stay with FEMARA® (letrozole) to help prevent distant metastases1,2,7
- FEMARA® is the only AI versus tamoxifen that provides protection from distant metastases during both this early peak of risk and beyond1,6,7
The unique efficacy profile of FEMARA® in the initial adjuvant setting is accompanied by a demonstrated safety profile, click here.
*Distant disease-free survival is a secondary end point of BIG 1-98; the primary end point of the study is disease-free
survival. Approval is based on a median 26-month follow-up.1
†In postmenopausal patients with HR+ early breast cancer.4,5
FEMARA® is indicated for the adjuvant treatment of postmenopausal women with hormone receptor positive early breast cancer.
Click here for Important Safety Information for FEMARA®.
References: 1. FEMARA® (letrozole) [summary of product characteristics]. Basel, Switzerland: Novartis Pharma AG; 2009. 2. The Breast International Group (BIG) 1-98 collaborative. A comparison of letrozole and tamoxifen in postmenopausal women with early breast cancer. N Engl J Med. 2005;353(26):2747-2757. 3. Fentiman IS. Optimising adjuvant endocrine treatment of breast cancer with aromatase inhibitors. Int J Clin Pract. 2006;60(6):689-693. 4. Mansell J, Monypenny IJ, Skene AI, et al. Distant metastasis—the most common type of early recurrence with adjuvant tamoxifen therapy. Poster presented at: 30th Annual San Antonio Breast Cancer Symposium; December 13-16, 2007; San Antonio, TX. 5. Rugo H, Rourke M, Dranitsaris G, Kaura S. Letrozole or anastrozole for the prevention of early recurrences in post menopausal women with early stage breast cancer: using number needed to treat (NNT) to compare benefit (abstract). EJC Supplements. 2008;6(7):118 (Abstract 236). 6. Gradishar W. Landmark trials in endocrine adjuvant therapy for breast carcinoma. Cancer. 2006;106(5):975-981. 7. Mouridsen H, for the BIG 1-98 Collaborative Group. Letrozole monotherapy vs. tamoxifen monotherapy or vs. letrozole in sequence with tamoxifen for postmenopausal women with endocrine-responsive early breast cancer. Presented at: 31st Annual San Antonio Breast Cancer Symposium (SABCS); December 10-14, 2008; San Antonio, Texas. 8. The Arimidex, Tamoxifen, Alone or in Combination (ATAC) Trialists’ Group. Effect of anastrozole and tamoxifen as adjuvant treatment for early-stage breast cancer: 100-month analysis of the ATAC trial. Lancet Oncol. 2008;9:45-53. 9. Data on file. Novartis Oncology, East Hanover, NJ.









