Well, not quite. The figure shows something different.
At baseline had 19/28 of ITT population with IGA3 (moderate). At 12 weeks, had 7/28 with IGA3. They had 4 subjects drop out (*due to "attrition") with no IGA score at week 12 (and they exclude 4 additional subjects for some reason to get to the N=20 PP population).
Percent of change in population with IGA3 score is not equal to a change in PASI score, nor a PASI-75% responder rate.
We (FlashingLeather?) did previously discuss the IGA 2-point responder rate somewhere else for IGA3/moderate disease, which is the number you want.
Agree that P may do better with higher dose and more severe patients, but no guarantees in the extrapolation (as with anything).