Is there a subgroup of long-term evolution among patients with advanced lung cancer?: Hints from the analysis of survival curves from cancer registry data

Table 1 Mix fraction and median survival times estimated for short- and long- term survival populations using different parametric models

Distribution	Numbers of components in the model	Short term survival population		Long term survival population		BIC
Distribution	Numbers of components in the model	c	Median	c	Median	BIC
Gaussian	One	1	7.21	-		36622.4
	Two	0.80	3.86	0.20	19.9	31353.9
Weibull	One	1	8.27	-		30320.8
	Two	0.92	9.17	0.08	10.10	29528.7
Log normal	One	1	4.52	-		29094.0
	Two	0.77	4.22	0.23	6.57	28942.5
Gamma	One	1	7.25	-		29250.5
	Two	0.64	3.57	0.35	11.9	28610.3

c, Mix fraction in the total population; BIC, Bayesian information criterion. The model with the smallest value of BIC has the best fit.

ISSN: 1471-2407