Stupakov G P, Volozhin A I, Didenko I E
Biull Eksp Biol Med. 1981 May;91(5):544-6.
Reduction of the strength of vertebrae not associated with osteoporosis has been revealed in patients who underwent strict bed rest for 20-40 days and died from sudden complications. The strength of vertebrae of humans who died in an accident was assumed as normal. A comprehensive analysis has shown that reduction of the strength was caused by alterations in the chemical composition of vertebral mineral substances, particularly by the diminution of the calcium content.
在经历了20至40天严格卧床休息并死于突发并发症的患者中，发现了与骨质疏松症无关的椎骨强度降低情况。将在事故中死亡的人的椎骨强度视为正常。综合分析表明，强度降低是由椎骨矿物质化学成分的改变引起的，尤其是钙含量的减少。
