statistically significant

It's quite remarkable that there is a distinct statistical significance between poor and wealthy boroughs in the capital, not only in England.

London’s shocking ‘health expectancy’ gap revealed: People in wealthier boroughs live extra decade 'in good health'
https://www.standard.co.uk/news/health/london-health-life-expectancy-boroughs-map-b1199835.htm

deteriorate - remember!!
impediment - remember!!
concerted
socio-economic / socioeconomic [Cambridge]related to the differences between groups of people caused mainly by their financial situation
turn the ship around

Office for National Statistics (ONS)
Healthy life expectancy (HLE)
Lewisham
The King’s Fund

This is the source of the article.
Healthy life expectancy in England and Wales: between 2011 to 2013 and 2021 to 2023
https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/healthandlifeexpectancies/bulletins/healthstatelifeexpectanciesuk/between2011to2013and2021to2023