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Table 4 Propensity score analysis results 2: Survival impact across quintiles based on the propensity to receive aggressive-approach chemotherapy within 14 days of death among chemotherapy recipients with metastatic non-small cell lung cancer, who survived at least 3 months after their cancer diagnosis (n = 3,534)

From: The effect on survival of continuing chemotherapy to near death

Analysis Variables HR (95%CI) P-value
Stratified analysis     
Lowest quintile of PS* Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 1.32 (0.90, 1.92) 0.15
Second quintile of PS Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 1.30 (0.98, 1.72) 0.07
Third quintile of PS Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 1.22 (0.81, 1.84) 0.35
Fourth quintile of PS Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 1.21 (0.94, 1.56) 0.14
Highest quintile of PS Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 0.85 (0.68, 1.07) 0.16
Multiple Cox regression adjustment using the PS Standard chemotherapy 1.00 - -
  Aggressive-approach chemotherapy 1.21 (1.00, 1.48) 0.05
  1. Abbreviation: HR, hazard ratio; CI, confidence interval; PS, propensity score.
  2. * Patients are least likely to receive "aggressive-approach chemotherapy within 14 days of death."
  3. † Patients are most likely to receive "aggressive-approach chemotherapy within 14 days of death."