NorthWest Biotherapeutics Inc (NWBO)

[biotrade49]

Flipper, in order to be counted in the number surviving for >36 mos you have to be among the 182 patients that are 36 months or more out from surgery. However, to be counted among the number of deaths between 0 and 36 months, the patient can be any number (0 to 36) of months out from surgery.

Totaling the 11 apparent LTFU early (prior to 19.5 mo), the 182 deaths that I counted on the 0 to 36 month curve and the 65 censored gives 257 patients. Subtract that from 331 and that gives 74. There is the problem as the paper seems to say there are only 44 patients past the 36 month mark when the numbers were collected. So where are the other 30?

I should say that counting the drops in the curve and the tick marks is not an exact procedure. I have more confidence in counting steps down than ticks. If a tick is 3 times as wide as normal I assume they are plotting 3 events at virtually the same time point, so it may not be an exact count.