Must a PI who collected data but did not contribute to its final analysis be one of the authors in the paper? A PI started a study and collected some data. The study was originally meant to evaluate the effectiveness of a treatment. After a year or so of collecting data, the PI decided to do some analyses. When I looked at the design of the study, I informed the PI that this design will not be able to provide any meaningful evaluation of effectiveness.

Some time later, I came across a novel method to analyse this data and tried it out. The results were quite interesting and with the PI's agreement, I decide to try and publish it.

My question is this:
Since the PI was not involved at all in the conceptualisation of this novel method and did not contribute in the interpretation of the results, should he be granted authorship? According to ICMJE guidelines, the answer should be no but I am unsure.

Addendum:
I would like to add, while thinking about this problem, I thought of big studies like the Framingham Heart Study, the Global Burden of Disease study. The PI of these studies are not automatically authors on every paper that came out of the data they collected. Would this be any different from my situation?
This doesn't seem to be related much to the fact that the other person is a PI. According to the question, someone collected data, and you have analyzed it. 

Unless the data was published elsewhere, you cannot cite it. So you will need to include the person who collected it as an author in order to have a source for the data. It's hard to expect otherwise, if you want to use unpublished data as the source for a paper. 

The ICMJE guidelines agree; one of their criteria for authorship is:


  Substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; AND


The other person has met this point through acquisition of the data.

The most gracious thing to do would be to offer the other person a co-authorship, which will then allow them to meet the other three bullet points in the ICMJE guidelines. 

The other person can then decide whether to accept the co-authorship, or whether to take a smaller form of acknowledgment for the data collection.