However, it was an observational study and, as such, can only establish a link rather than cause and effect: we can’t know for sure if irregular sleep patterns caused the increased risk.

The pattern is irregular because the height of the shape changes each time it is repeated. Image caption, Échelonnement, Sophie Taeuber-Arp, 1934, Peter Horree / Alamy Stock Photo.

The odds of OSA were significantly greater for individuals with mildly irregular or severely irregular sleep than for regular sleepers (odds ratios, 1.97 and 2.06, respectively).

People who had irregular sleep patterns – where day-to-day sleep duration varied by more than 60 minutes on average – had a 34% higher diabetes risk than those who had more regular sleep ...

Detroit’s “wheel spoke” grid was platted by Augustus Woodard after the village burned down in 1805. ... Aside from an irregular street pattern, ...

However, it was an observational study and, as such, can only establish a link rather than cause and effect: we can’t know for sure if irregular sleep patterns caused the increased risk.