According to TFA, about 1/3. With a minute's thought it occurs to me this may be the expected result for two reasons: 1. "Warehouse Work" as an industry repres

According to TFA, about 1/3. With a minute's thought it occurs to me this may be the expected result for two reasons: 1. "Warehouse Work" as an industry represents a wide variety of dissimilar activities. Amazon warehouse work is obviously heavily skewed toward manually sorting, stocking, picking, packing and loading massive numbers of individual irregularly-sized small and medium parcels. This kind of activity would be more injury prone compared to warehousing consistently-sized units which lends itself to mechanization. For example, I knew a guy who worked in the regional distribution warehouse for a furniture distributor. He basically drove a forklift every day unloading boxed sofas and recliners out of containers and onto palettes. They had safety zones marked on the floor where no one not in a forklift was permitted while forklifts were moving. Dude basically sat on an extra cushy memory foam seat surrounded by a full cage and roll bars. He and his mates were proud of their ability to coordinate and position their forklifts as precisely as synchronized ballerinas. 2. "Warehouse Workers" are not a homogeneous population. I've known some "professional" warehouse workers in the sense that they did it as a career. They tended to be "built for the job" both physically and in attitude. I've also met some Amazon warehouse workers and every one of them viewed it as a temporary gig on the way to something else and usually for a short-term (3 to 6 months). None of the ones I met seemed especially suited physically or temperamentally for repetitive warehouse work. Without these obvious differences controlled for in the stats, the headline claim of TFA seems about what I'd expect. I'd be much more interested in a comparison with a population of non-Amazon warehouse workers who are equally short-term and who also do similar manual sorting, stocking, picking, packing and loading of individual irregularly-sized small/medium parcels.