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    P2.16 - Treatment in the Real World - Support, Survivorship, Systems Research (ID 187)

    • Event: WCLC 2019
    • Type: Poster Viewing in the Exhibit Hall
    • Track: Treatment in the Real World - Support, Survivorship, Systems Research
    • Presentations: 1
    • Now Available
    • Moderators:
    • Coordinates: 9/09/2019, 10:15 - 18:15, Exhibit Hall
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      P2.16-15 - Survival and Clinical Immunotherapy Outcomes in Hispanic Patients vs Non-Hispanic White Patients with Non-Small Cell Lung Cancer   (Now Available) (ID 1514)

      10:15 - 18:15  |  Author(s): Doug Cress

      • Abstract
      • Slides

      Background

      The number of Hispanic (HISP) patients (pts) enrolled in immunotherapy (IMMUNO) trials is minimal or non-existent in non-small cell lung cancer (NSCLC). It’s well known that HISP pts with NSCLC have not only a different genomic profile than Non-Hispanic Whites (NHW)- like higher expression of EGFR mutations- but also better outcomes than NHW (“Hispanic Paradox”); thus the need to validate outcomes in HISP pts treated with IMMUNO.

      Method

      We present data in 436 NSCLC pts treated with IMMUNO at 5 large institutions (3 in the US, 2 in Latin America). The agents evaluated include: nivolumab, pembrolizumab and atezolizumab. 256 pts were HISP and 180 pts were NHW. Most of the pts were treated with single agent therapy as second line or beyond while a small group of pts were treated as first line. The primary endpoints of the study were: response rate (ORR), progression free survival (PFS) and overall survival (OS). Secondary endpoints were disease control rate (DCR), PD-L1 expression and others.

      Result

      The results are consolidated in the table below.

      Hispanics (n=256)

      NHW (n=180)

      p value

      Sex (males)

      52%

      45%

      0.2059

      ORR

      First Line

      35%

      30%

      0.6590

      Second Line

      18%

      19%

      0.3236

      Adeno

      22%

      24%

      0.6714

      SQCC

      24%

      23%

      1.0000

      PDL1 (+)

      29%

      32%

      0.4839

      PDL1 (-)

      5%

      17%

      0.3040

      Disease Control Rate: ORR+SD (DCR)

      Adeno

      68%

      67%

      0.8989

      SQCC

      67%

      46%

      0.0777

      Median PFS

      4m

      4m

      0.7509

      Median OS

      22m

      22m

      0.2004

      There were no statistical significant differences among HISP and NHW pts regarding ORR, DCR, PFS, OS, and responses according to PD-L1 status.

      Conclusion

      No significant differences were found in the clinical outcomes between these 2 ethnic groups despite the “Hispanic Paradox” and expected genomic differences; however pts with actionable mutations were excluded as they usually do not get IMMUNO as first or second line; an approach that might change after IMPOWER 150. This is the largest comparison of NSCLC immunotherapy outcomes in HISP vs NHW pts. These results are comparable to the ones seen in Checkmate and Keynote studies. As expected, higher response rates were seen in first line therapy and pts with PD-L1 (+) status. Further comparisons will be better addressed by a larger prospective study.

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