*distant screams of statisticians*pic.twitter.com/YNr5dZXJdR
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* @ADAlthousePhD appears in the background as screaming gets louder*pic.twitter.com/B7K30DC6i0
*distinct words can be heard through the screams* "...a third of the total sample..."pic.twitter.com/TEeYY3VBJM
People are wondering, so yes this is a published paper, have a read it's, uh, something https://content.iospress.com/articles/journal-of-alzheimers-disease/jad201058 …
AIC? no sorry I don't know her
this is a succinct description of the most common model-building approach I was taught in grad school in the early '00s (with the caveat that all models must include the same record set). 
It is exactly what I was taught in the second and third years of my undergraduate degree in stats classes!
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