TY - JOUR
T1 - Efficacy of nonestrogenic hot flash therapies among women stratified by breast cancer history and tamoxifen use
T2 - A pooled analysis
AU - Bardia, Aditya
AU - Novotny, Paul
AU - Sloan, Jeff
AU - Barton, Deb
AU - Loprinzi, Charles
PY - 2009/5
Y1 - 2009/5
N2 - OBJECTIVE: Various nonestrogenic therapies have been found to be effective in mitigating hot flashes, but it has been unclear whether the efficacy varies by whether women have had breast cancer and/or were taking tamoxifen. METHODS: This study used data from Mayo Clinic/North Central Cancer Treatment Group clinical trials that evaluated the efficacy of any nonestrogenic agent for hot flashes and had information on breast cancer history or tamoxifen use. Statistically significant changes from the fourth treatment week versus the baseline week, using individual patient data, were assessed using Student's t test. RESULTS: A total of 1,396 women from 20 hot flash studies were eligible for analysis. Overall, women without breast cancer had a similar percentage of baseline hot flash score at week 4, as did those with breast cancer (53% vs 50%, P = 0.92). Women who were not taking tamoxifen had a significantly lower percentage of hot flash score at week 4 as compared with those who used tamoxifen (54% vs 61%, P = 0.01). However, this was due to a higher reduction in hot flash scores in the placebo arms among women not receiving tamoxifen; the percentage reduction in hot flash scores at week 4 from baseline in the active therapy arms of the randomized placebo-controlled trials (ie, excluding placebo arms) was similar among the tamoxifen users and nonusers (difference in mean percentage reduction, 5.7; 95% CI, -1.76 to 13.16). CONCLUSIONS: Some nonestrogenic therapies seem to be useful for reducing hot flashes, irrespective of the etiology of hot flashes.
AB - OBJECTIVE: Various nonestrogenic therapies have been found to be effective in mitigating hot flashes, but it has been unclear whether the efficacy varies by whether women have had breast cancer and/or were taking tamoxifen. METHODS: This study used data from Mayo Clinic/North Central Cancer Treatment Group clinical trials that evaluated the efficacy of any nonestrogenic agent for hot flashes and had information on breast cancer history or tamoxifen use. Statistically significant changes from the fourth treatment week versus the baseline week, using individual patient data, were assessed using Student's t test. RESULTS: A total of 1,396 women from 20 hot flash studies were eligible for analysis. Overall, women without breast cancer had a similar percentage of baseline hot flash score at week 4, as did those with breast cancer (53% vs 50%, P = 0.92). Women who were not taking tamoxifen had a significantly lower percentage of hot flash score at week 4 as compared with those who used tamoxifen (54% vs 61%, P = 0.01). However, this was due to a higher reduction in hot flash scores in the placebo arms among women not receiving tamoxifen; the percentage reduction in hot flash scores at week 4 from baseline in the active therapy arms of the randomized placebo-controlled trials (ie, excluding placebo arms) was similar among the tamoxifen users and nonusers (difference in mean percentage reduction, 5.7; 95% CI, -1.76 to 13.16). CONCLUSIONS: Some nonestrogenic therapies seem to be useful for reducing hot flashes, irrespective of the etiology of hot flashes.
KW - Breast cancer
KW - Hot flashes
KW - Tamoxifen.
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U2 - 10.1097/gme.0b013e31818c91ca
DO - 10.1097/gme.0b013e31818c91ca
M3 - Article
C2 - 19188850
AN - SCOPUS:67649850757
SN - 1072-3714
VL - 16
SP - 477
EP - 483
JO - Menopause
JF - Menopause
IS - 3
ER -