LIVERPOOL, ENGLAND – Osteoarthritis is associated with an increased risk in mortality, but three factors – inactivity, low mood, and cognitive ability – could be important targets to reduce this risk, according to the results of a study presented at the World Congress on Osteoarthritis.
“There’s recently been increasing interest in whether osteoarthritis (OA) is associated with mortality as the literature has failed to find a consistent link,” said Simran Parmar, a third-year medical student at Keele University, Newcastle-Under-Lyme, U.K.
The first systematic review conducted by Marc C. Hochberg 10 years ago (Clin Exp Rheumatol. 2008;26:S120–4) showed “moderate evidence” of increased mortality caused by OA, compared with the general population, Mr. Parmar elaborated at the congress, which is sponsored by the Osteoarthritis Research Society International.Three years later, data from another study (BMJ. 2011;342:d1165) suggested an increased risk, with standardized mortality ratios calculated to be 1.55 for all-cause mortality and 1.71 for cardiovascular-specific mortality when comparing those with OA to those without OA in the general population.
However, more recent meta-analyses, performed in 2016, have failed to show a relationship between mortality and OA (Semin Arthritis Rheum. 2016;46[2]:160–7; Sci Rep. 2016;6:24393).
“This could be because of heterogeneity among the studies,” Mr. Parmar reasoned, adding that there was still an unclear relationship between OA and mortality.
So the aim of the current study was not only to take another look at the association to determine its strength but also to see what factors might be mediating the association in order to perhaps explain why OA might be associated with an increased risk of death.