To start a business with Shopify, use this link for a free trial http://shopify.com/jameshoffmannToday’s video is something a bit different. We thought we sh...
I was surprised by the lack of correlation between caffeine intake and sleep quality, but the takeaway, for me, is that if they were specifically looking into that, they’d need to control for other factors. And n=5 is pretty small.
Also, it will have been either a modest variation in caffeine intake, or else a variation in modest intake (e.g. adjusting intake say from 6->5, 2->1 or 1->0). These are people who’ve already stabilized their caffeine intake to not disrupt their lifestyle, and were just adjusting that sometimes to remove the first coffee of the day.
I was surprised by the lack of correlation between caffeine intake and sleep quality, but the takeaway, for me, is that if they were specifically looking into that, they’d need to control for other factors. And n=5 is pretty small.
Interesting stuff.
Also, it will have been either a modest variation in caffeine intake, or else a variation in modest intake (e.g. adjusting intake say from 6->5, 2->1 or 1->0). These are people who’ve already stabilized their caffeine intake to not disrupt their lifestyle, and were just adjusting that sometimes to remove the first coffee of the day.