Reacción a "Reactions: study links living as a renter to faster biological ageing"

This paper raises the possibility that living as a renter may have a negative influence on health and on the speed of ageing. To investigate this possibility, DNA methylation is studied in a large sample of the population.  
It is known that DNA methylation acts on the functionality of certain genes, usually by inhibiting their expression. Younger organisms have a greater number of methylation sites than older organisms. The rate at which this methylation decreases with age depends on many circumstances and marks, in a way, the rate of ageing. 
Although the study is statistically consistent, the conclusions cannot be considered definitive given the interaction of multiple factors in people who cannot afford their own home. Isolating just one of these circumstances may bias the study's conclusions.  
However, the paper delves deeper into the impact that different stressors and, in this case, living in rented accommodation, have on health and ageing. These circumstances should be taken into account when planning social intervention policies.