More info on criticals here. Before we go down the BMI route again let me remind you that "More than two-thirds of men and 6 in 10 women were overweight or obese" (https://en.wikipedia.org/wiki/Obesity_in_the_United_Kingdom) Therefore, the correlation exists but it isn't as strong as some people may think. The key take out is this is hitting men a lot harder than women.
Breakdown of UK patients in critical care
An analysis of 3,883 Covid-19 patients admitted to 229 critical care units in England, Wales and Northern Ireland up to Thursday has been published by the Intensive Care National Audit & Research Centre.
Of these patients, 871 have died, 818 have been discharged, and 2,194 were last reported as still receiving critical care.
The average age of the patients was 59.8 years. Some 72.5% were male, and 27.5% female. Some 66.4% were white, 14.4% Asian, 11.9% black, and 1.3% of mixed race.
Nearly three-quarters of the patients had a body mass index higher than the recommended healthy level of 18.5 to 25. Some 35% had a BMI of 25 to 30 - the overweight range. And 38.5% had a BMI over more than 30 - putting them in the obese range.
93.2% had previously been able to live without assistance in daily activities. Only 6.7% previously needed some assistance, and just three needed total assistance.
Focusing on the 1,053 patients who needed advanced respiratory support, the average age on admission was 61.9 years. 73% were male, 27% female. Out of this group, 66.3% died, and 33.7% are alive.
Examining the final outcome for patients admitted to critical care, for the 133 aged 16-39, 76.7% were discharged alive, and 23.3% died. For the 484 aged 60-69, 43.6% were discharged alive, and 56.4% died. For the 434 aged 70-79, 31.3% were discharged alive, and 68.7% died. And for the 107 aged over 80, 27.1% were discharged alive, and 72.9% died.
https://www.bbc.co.uk/news/live/world-52252981