Impact of age and comorbidities on treatment effect, tolerance, and toxicity in metastatic colorectal cancer (mCRC) patients treated on CALGB 80203

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 4038-4038 ◽  
Author(s):  
J. A. Meyerhardt ◽  
N. Jackson McCleary ◽  
D. Niedzwiecki ◽  
D. Hollis ◽  
A. Venook ◽  
...  

4038 Background: Little is known regarding the interaction of comorbid conditions (CC) and age when treating pts for mCRC. We sought to determine the impact of CC and age (<70 and ≥70 yrs) on survival and toxicity in these pts. Methods: We utilized a cohort of 238 pts with mCRC enrolled in CALGB 80203, a curtailed, multicenter 2x2 phase III trial of fluorouracil/leucovorin + oxaliplatin (FOLFOX) or irinotecan (FOLFIRI) ± cetuximab. Endpoints were overall survival (OS; time to death), progression-free survival (PFS; time to recurrence or death), and grade 3/4 toxicity. Pts completed a self-administered questionnaire on diet and lifestyle that included a modified Charlson's comorbidity survey. Cox models were adjusted for treatment (rx) arm, gender, and prior rx. Results: In CALGB 80203, 77% were < 70 and 23% ≥70. Thirty-five percent of pts had at least one CC (34% < 70 yrs; 41% ≥ 70 yrs). At least one grade 3/4 toxicity was experienced by 87% of pts ≥70 v 66% <70 (p=0.002), primarily hematologic (56% v 31%, p=0.003). Amongst 238 pts, 94% and 84% experienced a PFS event and OS event, respectively. No pts are censored prior to 3 yrs. Median follow-up was 23 mos. The adjusted hazard ratio (HR) for ≥70 v <70 of PFS was 1.0 (0.7–1.4) and of OS was 1.1 (0.8–1.6). Similarly, there were no significant differences in HR for PFS and OS by # CC. The table demonstrates no evidence of interaction between CC and age. Conclusions: While the early closure of CALGB 80203 presents sample size limitations for subset analyses, we did not observe an impact on PFS or OS by age and/or CC. Older pts did experience more toxicity from rx. Further studies with larger datasets are warranted. [Table: see text] [Table: see text]

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 4010-4010 ◽  
Author(s):  
N. A. Jackson McCleary ◽  
J. Meyerhardt ◽  
E. Green ◽  
G. Yothers ◽  
A. de Gramont ◽  
...  

4010 Background: Prior studies suggested that older and younger pts with colon cancer receive similar benefit from IV fluoropyrimidine (FU) adjuvant (adj) therapy (rx). Combination and/or oral FU rx are increasingly given as adj rx. We sought to determine the impact of pts age <70 v ≥70 yrs on colon cancer recurrence and mortality from adj rx with these newer options. Methods: We used data from 10,499 pts <70 yrs and 2,170 pts ≥70 yrs in 6 phase III adj rx trials comparing IV FU to combinations with irinotecan, oxaliplatin or oral FU (capecitabine and UFT/LV) in stage II/III colon cancer from the ACCENT database. Endpoints were overall survival (OS; time to death), disease-free survival (DFS; time to recurrence or death), and time to recurrence (TTR; censoring at last follow-up). Cox models were stratified by age and adjusted for gender and stage; interaction testing was used to explore the differential benefit by age. Results: Approximately 75% of pts had stage III disease (74% age<70, 77% age≥70). OS, DFS, and TTR were statistically significantly improved for those in the experimental v control arms among pts <70 but not those >70 ( table ); the interaction between age and rx was statistically significant for all endpoints (p=0.01 for OS, DFS, and TTR). These results were consistent whether experimental rx was oxaliplatin-based, irinotecan-based or oral FU. Deaths in first 6 month of adj rx were not statistically significantly different between experimental and control arm. Conclusions: Our results show conclusively that pts >70 do not receive the same benefit from combination and/or oral FU as those <70. Any benefit, if present, compared to IV FU/LV would not be clinically meaningful. Outcomes of experimental (combination or oral FU) vs control (IV 5-FU) by treatment and age [Table: see text] [Table: see text]


2009 ◽  
Vol 27 (22) ◽  
pp. 3664-3670 ◽  
Author(s):  
Cyrille Hulin ◽  
Thierry Facon ◽  
Philippe Rodon ◽  
Brigitte Pegourie ◽  
Lotfi Benboubker ◽  
...  

Purpose Until recently, melphalan and prednisone were the standards of care in elderly patients with multiple myeloma. The addition of thalidomide to this combination demonstrated a survival benefit for patients age 65 to 75 years. This randomized, placebo-controlled, phase III trial investigated the efficacy of melphalan and prednisone plus thalidomide in patients older than 75 years with newly diagnosed myeloma. Patients and Methods Between April 2002 and December 2006, 232 previously untreated patients with myeloma, age 75 years or older, were enrolled and 229 were randomly assigned to treatment. All patients received melphalan (0.2 mg/kg/d) plus prednisone (2 mg/kg/d) for 12 courses (day 1 to 4) every 6 weeks. Patients were randomly assigned to receive 100 mg/d of oral thalidomide (n = 113) or placebo (n = 116), continuously for 72 weeks. The primary end point was overall survival. Results After a median follow-up of 47.5 months, overall survival was significantly longer in patients who received melphalan and prednisone plus thalidomide compared with those who received melphalan and prednisone plus placebo (median, 44.0 v 29.1 months; P = .028). Progression-free survival was significantly prolonged in the melphalan and prednisone plus thalidomide group (median, 24.1 v 18.5 months; P = .001). Two adverse events were significantly increased in the melphalan and prednisone plus thalidomide group: grade 2 to 4 peripheral neuropathy (20% v 5% in the melphalan and prednisone plus placebo group; P < .001) and grade 3 to 4 neutropenia (23% v 9%; P = .003). Conclusion This trial confirms the superiority of the combination melphalan and prednisone plus thalidomide over melphalan and prednisone alone for prolonging survival in very elderly patients with newly diagnosed myeloma. Toxicity was acceptable.


Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 652-652 ◽  
Author(s):  
Antonio Palumbo ◽  
Sara Bringhen ◽  
Davide Rossi ◽  
Valeria Magarotto ◽  
Francesco Di Raimondo ◽  
...  

Abstract Background: In newly diagnosed myeloma patients the combination of bortezomib with melphalan-prednisone (VMP) was superior to MP. In relapsed-refractory patients the 4 drug combination of bortezomib-melphalan-prednisone-thalidomide (VMPT) induced a high proportion of complete responses (CR). Methods: Newly diagnosed myeloma patients (N=393) older than 65 years, from 58 centers in Italy, were randomly assigned to receive VMPT (N=193) or VMP (N=200). Initially, patients were treated with nine 6-week cycles of VMPT (bortezomib 1.3 mg/m2 days 1,4,8,11,22,25,29,32 in cycles 1–4 and days 1,8,22,29 in cycles 5–9; melphalan 9 mg/m2 days 1–4; prednisone 60 mg/m2 days 1–4 and thalidomide 50 mg days 1–42, followed by bortezomib 1.3 mg/m2 every 15 days and thalidomide 50 mg/day as maintenance) or VMP (bortezomib, melphalan and prednisone at the same doses and schedules previously described without maintenance). In March 2007, the protocol was amended: both VMPT and VMP schedules were changed to nine 5-week cycles and bortezomib schedule was modified to weekly administration (bortezomib 1.3 mg/m2 days 1,8,15,22 in cycles 1–9). Primary end-point was progression-free survival (PFS). Results: Patient characteristics were similar in both groups: median age was 71 years, 23% of patients were aged > 75 years. Patients who received at least 1 cycle were evaluated: 152 patients for VMPT (62 received bortezomib bi-weekly infusion and 90 weekly infusion) and 152 patients for VMP (62 received bortezomib bi-weekly infusion and 90 weekly infusion). Data were analyzed in intention-to-treat. The very good partial response (VGPR) rate was higher in the VMPT group (55% versus 42%, p=0.02), including a CR rate of 31% in the VMPT group and 16% in the VMP group (p=0.003). In the subgroup treated with weekly infusion of bortezomib, VGPR was 59% for VMPT and 37% for VMP (p=0.004), including 28% CR for VMPT and 10% for VMP (p=0.004). Subgroup analyses did not show any statistical difference between responses and either age, B2-microglobulin or chromosomal abnormalities, such as del13, t(4;14), t(14;16) and del17. After a median follow-up of 13.6 months, the 2-year PFS was 83.9% in the VMPT group and 75.7% in the VMP group (HR=0.73, 95% CI 0.38–1.42, p=0.35). In patients who received weekly infusion of bortezomib, the 2-year PFS was 86.8% in the VMPT group and 78.1% in the VMP group (HR=0.65, 95% CI 0.24–1.8, p=0.41). In patients who achieved CR after induction, the 2-year PFS was 100% for VMPT and 79% for VMP (p=0.02). The 3-year overall survival (OS) was 89.5% in the VMPT group and 88.7% in the VMP group (HR=1.02, 95% CI 0.43–2.46, p=0.96). The incidence of grade 3–4 adverse events (AEs) was similar in both groups. In the VMPT patients and in the VMP patients, the more frequent AEs were neutropenia (36% vs 31%), thrombocytopenia (20% vs 19%), peripheral neuropathy (18% vs 12%), infections (14% vs 10%), and gastrointestinal complications (7% vs 8%), respectively. The weekly infusion of bortezomib significantly decreased the incidence of grade 3–4 peripheral neuropathy (9% for VMPT and 3% for VMP). Conclusion: VMPT is superior to VMP in terms of response rates. Longer follow-up is needed to assess their effects on PFS and OS. The weekly infusion of bortezomib significantly reduced the incidence of grade 3–4 peripheral neuropathy without influencing outcome. Table. Complete responses, progression-free survival and peripheral neuropathy in all patients and in those who received weekly infusion of bortezomib VMPT group (n=152) VMP group (n=152) All patients (n=152) Subgroup with bortezomib weekly infusion (n=90) All patients (n=152) Subgroup with bortezomib weekly infusion (n=90) CR rate (%) 31 28 16 10 2-year PFS (%) 84 87 76 78 Grade 3–4 peripheral neuropathy (%) 18 9 12 3


Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 877-877
Author(s):  
Mauricette Michallet ◽  
Peter Dreger ◽  
Laurent Sutton ◽  
Ronald Brand ◽  
Sue Richards ◽  
...  

Abstract Abstract 877 This phase-III randomized EBMT-intergroup trial studied the impact of a consolidating autoHSCT vs no consolidation for patients with CLL in Binet stage A progressive, B or C , in CR, nodular PR or VGPR after first or second line therapy. The primary objective was to show that autoHSCT increased the 5-year progression-free survival (PFS) by 30%. Although it had been calculated that 270 patients were to be randomized, the study was terminated by the steering committee in July 2007 due to poor accrual. Here we present a first analysis based on 69% of expected follow-up forms. Results: Between November 2001 and July 2007, 223 patients were enrolled (SFGM-TC/FCLLG n=98, MRC n=62, GCLLSG n=32, SAKK n=10, other EBMT centers n=17). There were 74% males and 26% females. Binet stages were progressive A 13%, B 67%, C 20%; 59% were in CR, and 41% in very good or nodular PR. Of note, SFGM-TC/FCLLG included only patients in CR. 82% of the patients were enrolled in 1st, and 18% in 2nd remission. Patients were randomized between group 1 (autoHSCT n=112) and group 2 (observation n=111) after an induction treatment which was left at the discretion of the investigators. Median PFS was 43 months in the observation group but not reached in the autoHSCT group; 5-year PFS was 48% and 65%, respectively (p=0.005). Accordingly, autoHSCT halved the relapse risk (5-year relapse incidence 25% vs. 51%; HR 0.4 [0.23-0.71], p=0.002). Cox modeling for randomization arm, Binet stage, disease status, line of treatment, contributing group (country), and the interaction between randomization arm and contributing group confirmed that autoHSCT significantly improved PFS (HR 0.41 [0.23-0.75] p=0.004). The beneficial effect of autoHSCT was stable over all contributing groups although patients accrued by SFGM-TC/FCLLG overall had a significantly better PFS than patients from other countries (HR 0.2 [0.08-0.55], p=0.001). At 5 years, the probability of OS was 92% and 91% for autoHSCT and observation, respectively. Significant differences in terms of non-relapse death were not observed. At the last follow up, among 205 evaluable patients, 186 are alive (147CR, 39 relapse), 19 died (14 from relapse and 5 from non-relapse causes) . In conclusion, in patients with CLL in first or second remission, consolidating autoHSCT reduces the risk of progression (PFS) by more than 50%, but has no effect on overall survival. Disclosures: No relevant conflicts of interest to declare.


2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 10005-10005 ◽  
Author(s):  
A. Le Cesne ◽  
I. Ray-Coquard ◽  
B. Bui ◽  
M. Rios ◽  
A. Adenis ◽  
...  

10005 Background: IM the first-line targeted therapy for advanced GIST, must not be interrupted after one year (yr) in responding patients (pts) and has to be given continuously until disease progression (PD) or intolerance (Blay, Le Cesne et al, ASCO 2004 and 2005). The impact on progression free survival (PFS) of IM discontinuation in long lasting responding pts is unknown. Methods: This prospective national multicenter BFR14 study was initiated in June 2002. After 3 yrs of IM 400mg/day, pts free from progression were randomly offered to continue (C arm) or interrupt (I arm) IM, with the exception of pts initially randomized in the I arm after 1 yr of IM (32 pts). Pts allocated to the I arm could restart IM (same dose) in case of PD. Primary endpoint was PFS. Pts declining randomization proceed with IM. Results: As of december 2006, 286 pts were included in this trial and up to date, 35 non progressive pts at 3 yrs were randomized, 19 and 16 in the I anc C arm respectively. Pt characteristics were well balanced between the two arms. Nine progressions were reported after a median follow-up of 5.3 months (range 0–14) in this cohort of patients. IM reintroduction in the I arm after a re-progression allowed again a tumor control (OR or SD) in all evaluable pts so far. Conclusions: An increase in the rate of PD was observed in patients randomized after 3 years of IM. The final analysis will be performed after the randomization of 50 pts. Updated results including mutational analysis will be presented at the meeting. No significant financial relationships to disclose.


2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 4017-4017 ◽  
Author(s):  
G. Yothers ◽  
W. Blackstock ◽  
N. Wolmark ◽  
R. M. Goldberg ◽  
M. J. O’Connell ◽  
...  

4017 Background: Published reports suggest that CC pts of A descent have inferior survival compared to W pts. Whether these differences are explained by clinical factors at diagnosis, socioeconomic factors impacting access to care, or intrinsic differences in the biology of the tumors or the response to therapy is unclear. Pts in clinical trials have data collected for important baseline clinical factors and should receive comparable oncologic care regardless of socioeconomic factors. Methods: We analyzed data from 13,435 individual pts on 11 phase III adjuvant CC trials accrued from 1977 to 2002. Analysis was restricted to stage II and III pts, with race reported as black or white. Endpoints were overall survival (OS - time to death), recurrence-free survival (RFS - time to recurrence or death), and recurrence-free interval (RFI - time to recurrence censoring for death). Cox models stratified by study controlled for gender, stage, age, and treatment type (rx) to determine the effect of race. Kaplan-Meier estimates (KM) were adjusted (adj) by the Xie-Liu method for study, gender, stage, age, and rx. Results: A pts (n=1134, 8.4%) were younger than W (median 58 vs 61, p<0.001) and more likely female (55 vs 45%, p<0.001). A pts had poorer OS than W pts ( table ). OS results were consistent in subsets defined by gender, stage, and age. RFS results were attenuated compared to OS, but still favored improved RFS in W pts ( table ). RFI results were further attenuated and not significantly different by race ( table ). Conclusions: Even with identical rx for CC in controlled clinical trials, A pts have poorer OS and RFS than W pts. The OS deficit was consistent across subgroups, and neither deficit was explained by differences in gender, stage, age, or rx. RFI was similar for both races, suggesting that the OS and RFS differences may be largely due to deaths unrelated to CC. [Table: see text] [Table: see text]


2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 7565-7565
Author(s):  
Shunichi Sugawara ◽  
Makoto Maemondo ◽  
Toshiyuki Harada ◽  
Akira Inoue ◽  
Nobumichi Matsubara ◽  
...  

7565 Background: Standard first-line chemotherapy for elderly NSCLC pts has been considered as a monotherapy with vinorelbine or gemcitabine globally. However, we have demonstrated the high efficacy of CP for elderly pts in our previous trial (Ann Oncol 2010). Meanwhile, D has been considered as an alternative option for this population in Japan according to the result of WJTOG9904 (JCO 2006). Thus we compared the two regimens to select the proper candidate for future phase III trial. Methods: Eligible pts were aged 70 years or older with newly diagnosed stage IIIB/IV NSCLC; ECOG performance status 0-1; adequate organ function; written informed consent. Pts were randomized to receive carboplatin (AUC 6) on day 1 and paclitaxel (70mg/m2 on day 1, 8, and 15) every 4 weeks or D (60mg/m2 on day 1) every 3 weeks. The primary endpoint was overall response rate (ORR), and secondary endpoints were progression-free survival (PFS), overall survival, and toxicity profile. Assuming that ORR of 40% would be potential usefulness while ORR of 20% would be the lower limit of interest, 40 pts in each arm were required if expect 10% loss to follow up. Results: Between July 2006 and September 2010, 84 pts were enrolled and 41 pts in CP arm and 42 pts in D arm were eligible (median age, 76 years; 75% male; 72% stage IV). Median treatment cycle was 4 in each arm (CP, range 1-6; D, range 1-8). ORRs were 51% (95%CI: 36-66%) and 26% (95%CI: 12-39%) in the CP and D arm, respectively. With a median follow-up of 18.4 months, median PFS were 6.5 and 3.9 months in the CP and D arm, respectively (Logrank, P=0.0027). Grade 3 or severer toxicities were as follows: neutropenia (CP, 56% and D, 79%), anemia (CP, 15% and D, 7%), thrombocytopenia (CP, 10% and D, 0%), infection (CP, 20% and D, 25%). One treatment-related death due to neutropenia, pneumonia, and lethal arrhythmia occurred in D arm but none in CP arm. Conclusions: The platinum doublet CP achieved higher activity with an acceptable toxicity profile for elderly pts with advanced NSCLC compared to monotherapy with D. The superiority of CP to the monotherapy in this trial is consistent with results of recent IFCT-0501 trial (Lancet 2011).


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 3575-3575
Author(s):  
Tamas Pinter ◽  
Esteban Abella ◽  
Alvydas Cesas ◽  
Adina Croitoru ◽  
Jochen Decaestecker ◽  
...  

3575 Background: The literature reports that adding biologics to chemotherapy (ctx) may increase the incidence of clinically significant neutropenia. his trial was conducted to evaluate the efficacy of PEG in reducing the incidence of febrile neutropenia (FN) in pts with locally-advanced (LA) or metastatic (m)CRC receiving first-line treatment with either FOLFOX/B or FOLFIRI/B. Methods: Key eligibility: ≥ 18 years old; measurable, nonresectable CRC per RECIST 1.1. Pts were randomly assigned 1:1 to either placebo or 6 mg PEG ~24 h after ctx/B. The study treatment period included four Q2W cycles, but pts could continue their assigned regimen until progression. Pts were stratified by region (North America vs rest of world), stage (LA vs mCRC), and ctx (FOLFOX vs FOLFIRI). Estimated sample size (N = 800) was based on the expected incidence of grade 3/4 FN (primary endpoint) across the first 4 cycles of ctx/B, powered for PEG superiority over placebo. Other endpoints included overall response rate (ORR), progression-free survival (PFS), and overall survival (OS). Results: 845 pts were randomized (Nov 2009 to Jan 2012) and received study treatment; 783 pts completed 4 cycles of ctx/B. Median age was 61 years; 512 (61%) pts were male; 819 (97%) had mCRC; 414 (49%) received FOLFOX, and 431 (51%) received FOLFIRI. Grade 3/4 FN (first 4 cycles) for placebo vs PEG was 5.7% vs 2.4%; OR 0.41; p = 0.014. A similar incidence of other ≥ grade 3 adverse events was seen in both arms (28% placebo; 27% PEG). See table for additional results. Conclusions: PEG significantly reduced the incidence of grade 3/4 FN in this pt population receiving standard ctx/B for CRC. Follow-up is ongoing. Clinical trial information: NCT00911170. [Table: see text]


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 3636-3636 ◽  
Author(s):  
Eric van Cutsem ◽  
Alberto Sobrero ◽  
Salvatore Siena ◽  
Alfredo Falcone ◽  
Marc Ychou ◽  
...  

3636 Background: In the CORRECT phase III trial, the multikinase inhibitor REG demonstrated significant improvement in overall survival (OS) and progression-free survival vs placebo (Pla) in patients (pts) with mCRC whose disease progressed on other standard therapies. The most frequent REG-related grade ≥3 adverse events (AEs) of interest were hand–foot skin reaction (HFSR), fatigue, diarrhea, hypertension, and rash/desquamation. We explored whether the impact of REG in pts aged ≥65 years differed from that in younger patients. Methods: Pts with mCRC progressing following all other available therapies were randomized 2:1 to receive REG 160 mg once daily (n=505) or Pla (n=255) for the first 3 weeks of each 4-week cycle. The dose could be modified to manage AEs. The primary endpoint was OS. We report efficacy, safety, and dosing data from REG recipients by age. Results: The REG treatment group included 309 pts <65 years (307 evaluable for safety) and 196 pts ≥65 years (193 evaluable for safety). The OS hazard ratio (REG/Pla) was 0.72 (95% confidence interval [CI] 0.56–0.91) in pts <65 years and 0.86 (95% CI 0.61–1.19) in pts ≥65 years (interaction p-value = 0.405). Median OS was 6.7 vs 5 months for REG vs Pla in pts <65 years, and 6.0 vs 5.6 months, respectively, in pts ≥65 years. Most pts experienced drug-related AEs (<65 years: 93.8%; ≥65 years: 91.7%). The rates of grade ≥3 REG-related AEs of interest and dose modifications are shown in the Table. In pts <65 years vs ≥65 years, median (interquartile range [IQR]) duration of REG was 7.6 weeks (6.6–15.4) vs 7.1 weeks (5.1–17.2), median (IQR) daily REG dose was 160.0 mg (134.6–160.0) vs 160.0 mg (137.5–160.0), and median (IQR) proportion of planned REG dose was 83.3% (65.7–100.0) vs 78.6% (66.7–100.0), respectively. Conclusions: In the CORRECT trial, REG demonstrated an OS benefit in pts <65 years and ≥65 years. Safety and tolerability of REG appeared to be similar in both age subgroups. Clinical trial information: NCT01103323. [Table: see text]


Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 4267-4267
Author(s):  
Pongtep Viboonjuntra ◽  
Arnuparp Lekhakula ◽  
Kanchana Chansung ◽  
Chittima Sirijerachai ◽  
Pimjai Niparuck ◽  
...  

Abstract Introduction : To date, the ELN recommendation and NCCN guidelines are the principle mile stones to follow up the treatment response and to make the decision of TKIs switching. However, in real life practice, many factors influence changing the real switching date from the date had an indication. This study aims to analyze the impact of early switching to second line TKI, nilotinib, in real life practice, for the CML patients who failed, had sub-optimal response or were intolerant to imatinib. Methods : This prospective study was conducted through 7 medical centers in Thailand between 1st of September 2009 and 31st of August 2011. Adult CML patients of age ≥ 18 years old, in chronic and accelerated phase, who had failure, suboptimal response or intolerance to imatinib, based on ELN 2009 guideline, were included and were eligible with nilotinib 400 mg twice daily. Prospective data collection for 24 months of each patient was performed. The main objective was to identify the impact of early switching to nilotinib on major molecular response (MMR). The other objectives were to observe the efficacy of nilotinib including overall survival, progression free survival and the safety. The survival results were presented as Kaplan-Meier survival curves. For the comparison of the treatment groups, the Kaplan-Meier estimator with the corresponding log-rank test for equality of survivor functions across treatment group was applied. Results : The final 108 cases were analysed. The median age was 47 (17-79) years with the proportion of male to female of 1.4:1 respectively. The median duration of the prior imatinib treatment was 18 months (2-142 months). The median duration between the date of indication and the date of real switching was 3.1 months (0-62.8 months) with 50% changing less than 3 months, 26.9% between 3 months and 12 months, and 23.1% changing longer than 12 months. The indication of switching included 63.6% failure to imatinib, 29% intolerance to imatinib and 7.4% suboptimal to imatinib. On the nilotinib switching, 70.4% completed 24 months follow-up, and 29.6% discontinued treatment mostly because of unsatisfactory results or adverse events. Evaluation was made every 3 months based on 2009 ELN recommendation. At 3 months, 57%, 20%, and 8% of the patients achieved CHR, CCyR and MMR, respectively. Those who did not achieve CHR at 3 months never achieved MMR, while 86 % of those who achieved CCyR at 3 months achieved MMR. All CML achieving MMR at 3 months had sustained MMR throughout the study period (24 months). Imatinib suboptimal response had better outcome than imatinib failure and imatinib intolerance groups. A preliminary analysis of BCR-ABL mutation was performed on 90 cases, and mutations were found on 21 cases. Two of them were T315I which were excluded from the study. The cases with mutation had poorer response to treatment than those without mutation. There was one case with initial G250E mutation developing T315I mutation after treatment with nilotinib. At 24 months, one case progressed to accelerated phase and 3 cases progressed to blastic transformation. The 2-year overall survival and 2-year progression-free survival and were 98.9% and 96.9% (figure 1 and 2), respectively. The interquatile analysis was done to identify the groups of cumulative MMR according to the duration between the date of indication and the date of real switching to nilotinib. The patients who switched to nilotinib within 12 months after date of indication could have a greater chance to achieved MMR than those who switched treatment later than 12 months (p(log-rank) = 0.002) (figure 3). Skin rash, musculoskeletal pain, and infection were the three most common non-hematologic adverse events, However, most of them were grade 1-2, except for 4 cases with grade 3-4 infections. Grade 3-4 hematologic adverse events included thrombocytopenia (12%), neutropenia (11%), anemia (5%) and leucopenia (4%), and most of them were manageable. Although biochemical abnormalities were commonly found, most of them were mild. Conclusions : Nilotinib, as a second line treatment showed excellent efficacy and tolerability. Indication for nilotinib treatment, initial mutation status and depth of response at 3 months after treatment can predict outcomes of the patients. However, the patients will have a greater chance to achieve MMR if they switched to nilotinib within 12 months after the date of indication for changing. Disclosures No relevant conflicts of interest to declare.


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