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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.