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Table 3 Validation of the extrapolated estimates by 13 years of follow-up and the Kaplan-Meier method

From: Estimating the lifelong health impact and financial burdens of different types of lung cancer

  Cohort size 13-year follow-up Kaplan-Meier estimate, mean (SE) months Estimate using the extrapolation based on the first 7 years of follow-up, mean (SE) months Relative bias,% Pvalue*
SCLC 4,425 14.75 (0.45) 15.42 (0.38) +4.54 0.424
NSCLC 38,509 25.27 (0.24) 25.89 (0.16) +2.45 0.165
  SqCC 11,507 25.51 (0.43) 26.21 (0.31) +2.74 0.528
  Adenocarcinoma 20,926 27.05 (0.30) 27.40 (0.23) +1.29 0.551
  Other NSCLCs 6,076 18.68 (0.44) 20.12 (0.37) +7.71 0.122
  1. SE: standard error; NSCLC: non-small cell lung cancer; SCLC: small cell lung cancer; SqCC: squamous cell carcinoma.
  2. *Comparison using Z-statistic.