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Table 3 Observed mean cost, KMSA estimation, cost extrapolation and mean long-term cost by TNM stage at diagnosis (€, 2005)

From: Long-term costs of colorectal cancer treatment in Spain

TNM Stage N Censored cases Observed mean cost KMSA estimation cost Cost extrapolation Total long-term costs
N (%) Mean 95 % CI
In situ 40 40 (100.0) 9634 17,692 3016 20,708 (16,902; 25,500)
I 87 79 (90.8) 23,999 27,272 4485 31,757 (27,172; 36,731)
II 179 126 (70.4) 31,262 37,247 3869 41,116 (38,313; 43,979)
III 174 94 (54.0) 41,550 44,934 2747 47,681 (43,439; 52,551)
IV 144 26 (18.1) 27,873 28,050 10 28,061 (26,533; 29,694)
Unknown 75 42 (56.0) 10,363 11,976 521 12,497 (10,411; 14,842)
Global 699 407 (58.2) 28,741 32,772 2435 35,207 (33,521; 36,989)
  1. KMSA Kaplan-Maier sample average, CI confidence interval