Survival, quality-adjusted survival, and other clinical end points in older advanced non-small-cell lung cancer patients treated with albumin-bound paclitaxel

C J Langer, V Hirsh, I Okamoto, F-J Lin, Y Wan, S Whiting, T J Ong, M F Renschler, M F Botteman, C J Langer, V Hirsh, I Okamoto, F-J Lin, Y Wan, S Whiting, T J Ong, M F Renschler, M F Botteman

Abstract

Background: This analysis compared the quality-adjusted survival and clinical outcomes of albumin-bound paclitaxel+carboplatin (nab-PC) vs solvent-based paclitaxel+carboplatin (sb-PC) as first-line therapy in advanced non-small-cell lung cancer (NSCLC) in older patients.

Methods: Using age-based subgroup data from a randomised Phase-3 clinical trial, nab-PC and sb-PC were compared with respect to overall response rate (ORR), overall survival (OS), progression-free survival (PFS), quality of life (QoL), safety/toxicity, and quality-adjusted time without symptoms or toxicity (Q-TWiST) with ages ⩾60 and ⩾70 years as cut points.

Results: Among patients aged ⩾60 years (N=546), nab-PC (N=265) significantly increased ORR and prolonged OS, despite a non-significant improvement in PFS, vs sb-PC (N=281). Nab-PC improved QoL and was associated with less neuropathy, arthralgia, and myalgia but resulted in more anaemia and thrombocytopenia. Nab-PC yielded significant Q-TWiST benefits (11.1 vs 9.8 months; 95% CI of gain: 0.2-2.6), with a relative Q-TWiST gain of 10.8% (ranging from 6.4% to 15.1% in threshold analysis). In the ⩾70 years age group, nab-PC showed similar, but non-significant, ORR, PFS, and Q-TWiST benefits and significantly improved OS and QoL.

Conclusion: Nab-PC as first-line therapy in older patients with advanced NSCLC increased ORR, OS, and QoL and resulted in quality-adjusted survival gains compared with standard sb-PC.

Conflict of interest statement

CJL received honorarium/consulting fee and has served as an advisor for Celgene Corporation. VH is a consultant for Celgene Corporation. F-JL, YW, and MFB are employees, and MFB is also a shareholderof Pharmerit International, an independent contract research organisation that received research funding from Celgene Corporation. SW, TJO, and MFR are employees of Celgene Corporation. The remaining authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Composite change from baseline for the 16-item FACT-Taxane. Symptoms were reported prior to dosing on day 1 of each cycle. Note that larger bars represent greater deteriorations from baseline as perceived by patients. Composite change (A) in patients aged ⩾60 years and (B) in patients aged ⩾70 years. BL, baseline; nab-PC, nab-paclitaxel+carboplatin; sb-PC, solvent-based paclitaxel+carboplatin.
Figure 2
Figure 2
Partitioned survival plots showing the mean times in TOX, TWiST, and REL states. The area under TOX curves represents the mean time in TOX state. The difference in area under PFS and TOX curves represent the mean time in TWiST state. The difference in area under OS and PFS curves represents the mean time in REL state. Partitioned survival plots (A) in patients aged ⩾60 years and (B) in patients aged ⩾70 years. nab-PC, nab-paclitaxel+carboplatin; OS, overall survival; PFS, progression-free survival; sb-PC, solvent-based paclitaxel+carboplatin; TOX, toxicity with adverse event grade ⩾3.
Figure 3
Figure 3
Utility threshold plot through 24 months of follow-up. In these plots, the utility of TWiST was fixed at 1, and the utility for toxicity (UTOX) and utility for time after disease progression (UREL) both varied from 0 to 1. The base-case scenario (UTOX=UREL=0.5) was marked with a white dot. The diagonal bands of different shading indicate the magnitude of absolute Q-TWiST gain from nab-PC (vs sb-PC). The grid-shaded area indicates pairs of utility weights with statistically significant (P<0.05) Q-TWiST differences in favour of nab-PC. (A) Patients with an age ⩾60 years; (B) patients with an age ⩾70 years.
Figure 4
Figure 4
Differences in the Q-TWiST at various follow-up durations. Differences in the Q-TWiST (A) in patients aged ⩾60 years and (B) in patients aged ⩾70 years. Note: The solid circle sign represents significant difference in Q-TWiST (P<0.05) and the hollow circle sign represents non-significant difference in Q-TWiST.

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