In the remote village of Sedanka in Russia's Far East, almost all of its fighting-age men have left to join the Ukraine war.

The BBC’s analysis shows that 67% of the dead are from rural areas and small towns - classed as those with populations under 100,000 people - even though 48% of Russia’s population lives there.

The rate of losses was smallest in major cities, with Moscow having the least deaths per capita - five people for every 10,000 males, or 0.05%.

In poorer regions, such as Buryatia in eastern Siberia, and Tuva in southern Siberia, the death rate is 27 to 33 times higher respectively than in the capital.