Bit of beginner's question in terms of statistics...
How can I determine whether the treatment (patients A and B) is significantly more effective at raising PO2 levels than the placebo (patients C to E)? This would be a straightforward ANOVA if it weren't for TREATMENT and NON-TREATMENT days, the latter of which no patients received either treatment nor placebo.
I feel a 2-way ANOVA will answer this? But for some reason I feel this may be wrong.
Please could anyone explain?